The Art of Manliness - July 31, 2025


#312: The Costs of Light Pollution and the Benefits of Darkness


Episode Stats

Hate Speech Sentences

1


Summary

Well throughout human history, the nighttime sky has been a source of inspiration for art, literature, philosophy and religion. But if you're like most people living in cities or suburbs, or even rural parts of the country, you've likely never encountered a truly dark night. Thanks to electric lighting the nighttime can be as bright as day, and while it's allowed us to function well into the midnight hour, electric lighting has deprived us of many of the spiritual and physical benefits that only come out in the dark. My guest today has written a book where he explores the decline of darkness in our modern age. His name is Paul Bogard, and his book is The End of Night.


Transcript

00:00:00.000 brett mckay here and welcome to another edition of the art of manliness podcast well throughout
00:00:18.660 human history the nighttime sky has been a source of inspiration for art literature philosophy and
00:00:23.620 religion but if you're like most people living in cities or suburbs or even rural parts of the
00:00:27.720 country you've likely never encountered a truly dark night thanks to electric lighting the nighttime
00:00:32.840 can be as bright as day and while it's allowed us to function well into the midnight hour electric
00:00:37.500 lighting has deprived us of many of the spiritual and physical benefits that only come out in the
00:00:42.420 dark my guest today has written a book where he explores the decline of darkness in our modern
00:00:46.160 age his name is paul bogard and his book is the end of night searching for natural darkness in an age
00:00:51.200 of artificial light and today on the show paul and i discuss what true darkness actually looks like
00:00:55.680 and the type of undark night that most modern folks experience he then shares where the last
00:01:00.640 few spots in america and europe where you can still experience true darkness and what the night sky in
00:01:05.220 those places looks like we then delve into what we miss out spiritually by not experiencing true
00:01:09.520 darkness as well as the health detriments that come with being exposed to artificial light 24 hours a
00:01:14.360 day paul also shares some of the common myths about darkness such as the idea that darkness is more
00:01:18.540 dangerous than light the show is going to inspire you to seek out a remote area of wilderness so you
00:01:22.640 experience the beauty that comes with a truly dark night after the show's over make sure to check
00:01:26.260 out the show notes at aom.is slash bogard paul bogard welcome to the show great to be here so you wrote
00:01:35.540 a book called the end of night and it's all about how night time has pretty much ended for most of
00:01:41.800 human civilization i'm curious what led you down the path to start exploring the end of night and why
00:01:48.120 darkness has these benefits that we often overlook well i guess i think of myself as lucky i grew up
00:01:54.260 in minneapolis but the year i was born my grandparents and parents built a cabin in the northern part of
00:02:00.120 the state where we call it up north here so all my life i've been going up north to this cabin on a lake
00:02:06.260 and so i grew up with what i would describe as real night or real darkness that's you know darkness
00:02:13.220 without really any artificial light and i used to still do actually take the canoe out into the
00:02:19.480 middle of the lake and just kind of lie back under the stars and soak in the universe so having that
00:02:25.740 firsthand experience of a real night and real darkness especially as a kid and growing up i took
00:02:33.200 that with me into the rest of my life and when i was looking for a subject to write about after college
00:02:40.020 i started thinking about nighttime and writing about it and when i discovered the problem of
00:02:45.340 light pollution everything just kind of clicked and all of a sudden i was writing about all the
00:02:49.980 benefits of darkness and all the costs of of light pollution why does darkness have such a bad rap
00:02:56.660 because like i mean everyone's afraid of the dark like that's the thing you're supposed to be afraid of
00:03:00.160 we do everything we can to illuminate the dark what's going on there yeah there's no doubt about it i mean
00:03:06.500 i think a lot of you know this issue of of light pollution comes down to our fear of the dark and
00:03:12.080 you know it's a fear of darkness that goes back pretty much as far as we go back i think and
00:03:18.520 you see it in in historical literature nighttime and darkness as being the time of thieves and
00:03:24.820 danger and that kind of thing and then certainly our popular culture has uh reinforced that you know
00:03:31.820 so that's when attacks happen that's when home invasions happen that's when the bad guys come out
00:03:36.400 all that and so i think if you asked most people kind of you know when does when's the most dangerous
00:03:43.960 time to be out or when does crime happen people would say at night in the dark and the surprising
00:03:50.740 thing is that statistically that's just not true you know i've talked to police in a lot of different
00:03:56.160 cities when i was writing the book and they said you know everybody thinks that
00:03:59.520 night time is is the dangerous time but you know daylight is when houses are being robbed and
00:04:05.540 and you know people are being attacked by people they know inside their house you know it's very
00:04:10.600 it's relatively rare to be attacked outside so we have all these preconceived notions about
00:04:15.820 that darkness is dangerous and to go off that then that light is safety and that more light is more
00:04:25.240 safety and you know it's important to say that some light can certainly help us be safe outside help
00:04:31.040 us see our way but the the challenge is that we just think that more ever more light will make us
00:04:35.940 ever safer so we keep pumping out more and more light yeah i thought that the chapter on sort of the
00:04:41.300 myths of darkness being unsafe because that's what you hear right whenever like for home security
00:04:45.940 like you gotta have outdoor lighting have a well-lit house because bad guys like to do things when they
00:04:52.520 can't be seen but you make the point and i think a police officer made the point like well bad guys
00:04:56.880 also like to see what they're doing exactly yeah i heard that again and again when i was researching
00:05:02.620 the book that you know i heard people say uh bad guys are just as afraid of the dark as we are
00:05:08.040 and they you know they like to be as you said they like to be able to sort their tools in the light
00:05:13.500 they like to see what's going on and you see it on you know remarkably if you go to say a website
00:05:19.580 of a police department your local police department you're bound to see a message that reads something
00:05:25.420 like you know make your house safe at night light it up light up your yard so even the police are kind
00:05:31.300 of following behind this questionable notion that you know light makes us safe and darkness is dangerous
00:05:37.800 yeah and then i mean you also to point out like too much light can be dangerous particularly on
00:05:42.560 roads and highways where just we flood the streets with light and it actually creates this glare that
00:05:47.680 makes it harder to see and can increase the chances of accidents yeah it's really true i mean i think
00:05:52.620 especially if you think of you know as you get older your eyes change it becomes more difficult
00:05:58.500 to drive at night in some part because of what's happening physically to your eye but then we have
00:06:04.320 all this glaring light shining into our eyes as well and i think you know when i give talks and when i
00:06:10.800 give readings and that kind of thing i sometimes apologize to people because i say you know once you
00:06:14.780 once i've talked and shown you some of these things you're going to go out into the night and start
00:06:19.560 seeing this everywhere and one of the things you see is glary light you know light that's allowed to
00:06:25.900 just you know we're kind of shooting it all over the place and including straight into our eyes which
00:06:31.400 makes it harder to see which makes it more dangerous at night and let's have light but let's have light
00:06:37.220 just going down where we need it and not shining into our eyes or alternately into our bedrooms into our
00:06:43.720 houses that kind of thing right and going back to the bad guy you had some pictures in there of
00:06:48.480 houses that were just you know had lots of light but you couldn't see the person because there was
00:06:53.200 no contrast or they were wearing all white and you couldn't tell that they were there yeah it's
00:06:58.660 really remarkable there's a great friend of mine sent me this uh two images and and they're in the
00:07:04.180 book of of the same scene of a yard in tucson and in the first scene you just kind of you see this
00:07:10.220 this yard with a bright light and the second scene he's put up his hand to shield the light so that
00:07:16.140 you have the light just going down and nowhere else and then you can see the bad guy who was you know
00:07:20.820 standing behind the in the shadow all the time but because the light was so bright you couldn't see
00:07:26.700 him you're you know bright lights make our pupils shut down so it makes it you know we see makes it
00:07:32.280 harder for us to see bright lights cast shadows where the bad guys can hide and i think even maybe the
00:07:38.220 biggest issue that we're talking about here too is that bright lights give us the illusion of safety
00:07:43.620 so we we look out onto a street we look out onto a college campus and we see it all lit up and we
00:07:49.460 think oh it's safe but you know lights aren't going to make you safe and if somebody's out there
00:07:55.140 they can hide easily and yeah lights don't make us safe lights don't make us safe later on we'll talk
00:08:00.020 more about how we can use light more smartly i guess is the word i'm looking for yeah but uh let's talk
00:08:04.960 about this idea of true darkness or real night what is that and what sort of darkness do most people
00:08:12.720 experience who live in the cities and suburbs yeah i think it's a really interesting question because
00:08:19.020 you know if you ask somebody does it get dark at night they're gonna you know duh like of course it
00:08:26.460 gets dark at night but it honestly it really it doesn't get dark at night not at least not as dark
00:08:31.520 as it used to there's a couple different ways to think about this one is something called the
00:08:36.060 bordel scale which is a a nine point scale starting at starts at nine in our brightest places so pretty
00:08:43.200 much any any city downtown and works its way down to a level one which would be what we call natural or
00:08:51.260 real darkness so that is darkness as it was before the advent of electric lighting essentially and
00:08:58.880 what's remarkable when you start thinking about it this way is to learn that most americans live most
00:09:04.640 of their lives in levels five and above so this whole second half of the scale of darkness is something
00:09:11.820 that most of us never even experience we don't even know what it what it looks like and it's getting
00:09:17.780 harder and harder to know what it looks like certainly in the lower 48 states there are very few places
00:09:25.200 that you could honestly say are a level one darkness where there's no evidence of artificial
00:09:31.120 light either you know no uh no light off on the horizon or uh no light even in the sky from or on you
00:09:39.260 know from uh from a distant town or something like that so yeah it gets dark and it gets darker in the
00:09:44.700 countryside than it does in the city but it doesn't get dark like it used to and if you've you know if
00:09:51.620 you've lived long enough uh as i have i guess to to grow up with experiencing real nights real darkness
00:09:59.780 and now you're in the same place you've seen the change it's not as dark as it used to be
00:10:05.220 and so i mean where can people still experience darkness unaffected by human light here in the united
00:10:10.640 states well you know the if you're uh this is the crazy thing if you're east of the great plains so
00:10:17.980 the whole half of the eastern part of the country technically there's no more natural darkness left
00:10:23.920 uh again there certainly are dark places people go stargazing you know um some of the national parks
00:10:30.340 thinking of acadia up in maine or out on uh the outer banks uh some places in west virginia
00:10:36.720 there are places where you can experience you know close to a real night but to get back to
00:10:42.220 that real natural darkness you have to get out into the ocean off the coast or if you're lucky out into
00:10:50.400 the western states sometimes you can get back to some southern utah is a great place to go the oregon
00:10:56.740 desert there are places where you can you can get back to it but for most of us most of our nights
00:11:03.380 we're not even close and how does the night sky change when there's little or no light pollution
00:11:10.320 because i think you know we look at the stars and like oh there's some stars there you can see the
00:11:13.960 big constellations like the big dipper cassiopeia but what happens well how does the sky change
00:11:20.580 whenever you have absolutely no light interfering with your stargazing yeah it's an entirely different
00:11:26.500 experience really i'll give you a good example which is when i was working on the end of night i was
00:11:31.980 living in winston-salem north carolina and working at wake forest and i remember walking home one night
00:11:37.240 and i was in the fall and i looked kind of over into the eastern sky and i saw you know the stars of
00:11:44.040 orion which are great the three stars in the belt and betelgeuse and rigel these super bright stars and
00:11:50.800 and you know everybody most of us know what orion looks like i couldn't really see any other stars but i
00:11:57.180 was you know psyched to see those stars and then i learned soon after that that these stars in orion
00:12:03.340 are 98 or 99 percent brighter than any other stars in our sky so essentially what i was what i was seeing
00:12:10.640 were these super bright stars and i wasn't seeing 98 or 99 percent of the stars i could be seeing most
00:12:18.100 of my students have never seen the milky way which is an awesome experience and when you do get into
00:12:25.080 those experiences of sort of what i'm saying is real night or real darkness you can have the feeling
00:12:31.780 of there are so many stars that you feel like you're falling into them it's just this kind of
00:12:37.420 disorienting dizzying experience and the stars are rising out of the horizon on one side and falling off
00:12:44.780 the edge of the earth and the other and you it's just the surreal almost surreal experience you'll start
00:12:51.900 to have a different the sky actually if you're in a dark enough place actually looks more deep blue
00:12:58.840 than it does black so there's actually enough light in the sky that it causes just an entirely
00:13:05.000 different experience and it's it's an experience that used to be completely common that all of us
00:13:10.680 would have experienced if we'd been alive you know 100 150 200 years ago and now it's something that
00:13:16.920 very few people ever experience right and you talk about uh vincent van gogh's starry night that famous
00:13:22.800 painting and everyone's kind of like what's going on there like it's blue it's not black there's
00:13:27.200 different colored stars but you think that he's like tripping on something but just the way you
00:13:32.720 described it like that's probably what he saw like he saw a deep blue sky with different colored stars
00:13:38.180 yeah that's a great example i often show that image in my presentations and i say you know
00:13:44.340 van gogh has it had his had his issues but i think that uh you know a lot of people look at that
00:13:49.740 painting and they just think he was as you said dripping on something or a crazy man or something like
00:13:53.820 that or as one museum guy described to me van gogh was a werewolf of energy you know we just think he
00:14:00.200 was this this uh unbelievable human being and that may all be true but he was also seeing a sky that
00:14:07.280 we no longer see anymore and we have evidence of that in his letters to his brother theo where he
00:14:13.220 would write about the different colors of stars over paris which you know you go to paris these
00:14:19.220 days and you're lucky to see two dozen stars let alone the colors of of the stars so when i'm talking
00:14:25.800 about that painting sometimes i say you know the night sky has inspired artists for you know all of
00:14:33.200 history um van gogh's the one of the best examples of that and just think about all the young van gogh's
00:14:38.600 out there right now who are not being inspired yeah so i mean yeah it seems like not being able
00:14:43.540 to see the full solar system that's what's out there has probably really disconnected us from the
00:14:49.740 cosmos or nature in a in a weird spiritual way i definitely think so i mean i like to say that you
00:14:56.620 know we've taken what was once one of the most common human experiences which is walking out the
00:15:01.460 door at night and coming face to face with the universe and we've made that one of the most rare of
00:15:06.160 human experiences and that that experience that first-time experience of coming face to face with
00:15:11.540 the universe has as i said that inspired art but it's also inspired religion philosophy spirituality
00:15:17.380 science all these things all these elements of what it means to be human and there are a lot of costs
00:15:23.780 to light pollution that have we can attach dollar signs to or talk about in terms of human health
00:15:29.280 environmental health but then there are also these what are often sort of intangible costs you know what
00:15:34.960 do we lose when we can't see a real night sky it's hard to put a dollar sign on it but that doesn't
00:15:40.820 mean it's not incredibly valuable to who we are as a species so what was life like before we had
00:15:47.940 electric lights i mean did i mean right now because of lights we can just be out 24 7 and everything's
00:15:54.560 fine what happened what was life like before that did people just stay in as soon as that didn't you
00:15:59.520 know as soon as the night came didn't leave their homes or were they out and about what was life like
00:16:05.180 you know everything that i found was that it was a mix you have some stories of when night came
00:16:12.680 people went this is i'm thinking especially in in western europe people would you know go inside and
00:16:18.680 kind of batten down the hatch you know as though uh they were on a ship and a storm was approaching you
00:16:23.720 know lock lock themselves inside kind of turn over the outside to the the bad guys as it were but then
00:16:31.420 you also have stories and and and histories of night being the time of freedom you know of when
00:16:38.100 people who were in one way or the other in bondage during the day were then at night kind of allowed
00:16:44.600 their freedom and they could go see their friends or they could be with their partner my fiancee was
00:16:50.360 in rwanda last summer and she had these remarkable stories of towns that you know have either no
00:16:58.120 electric light or electric light only for part of the evening and then the rest of the night is dark
00:17:03.980 and she said you know people would come out and see their friends and the streets were you know alive
00:17:08.700 with with neighbors and seeing themselves and the night became this friendly friendly time where people
00:17:14.660 were out and about rather than this what it is i think too often even in modern society kind of a
00:17:21.160 time when people are nervous and anxious and and kind of going inside to hide so historically they
00:17:27.240 were both both things but i think it's so hard for us to even imagine what it's like before electric
00:17:34.220 light because we're so swamped in it that it's hard to think like what would i do if i were in that
00:17:39.140 situation right you also talk about how people stayed in bed longer than we do like they'd go to
00:17:45.060 bed pretty much when it got dark and they'd lay there and sometimes they would wake up in the middle
00:17:50.720 of the night and now we think oh man it's insomnia this is i gotta go to the doctor get some ambien
00:17:55.560 but for them that was just like a natural part of sleeping you would have a first sleep and then you'd
00:18:00.700 wake up do some stuff and then have a second sleep and wake up in the morning yeah it's it's a
00:18:06.140 remarkable thing uh this was discovered by a historian at virginia tech who wrote a book called
00:18:11.060 at days close who discovered in the literature from western europe this what you just mentioned
00:18:16.440 the the idea of first sleep and second sleep and it makes a lot of sense if you think about it you
00:18:21.560 know if there's no electric light if there's no electricity to do all the things that that we do
00:18:26.920 when it gets dark out folks would go to sleep and they would they would sleep for a while and then
00:18:31.920 they would wake up at one or two or three in the morning and have this uh this intermission as it
00:18:38.080 were in their sleep and he discovered stories of you know couples would uh make love they'd have you
00:18:44.320 know conversations uh people would get up and go see their friends people would pursue you know their
00:18:50.320 their private hobbies you know things that they didn't get to do during the day and then they would
00:18:55.580 go back to sleep and sleep until the sun came up so to extrapolate that forward to our time where we
00:19:01.340 think of like waking up in the middle of the night is you know we freak out if we wake up because we're
00:19:05.700 like oh my god you know you know do i have insomnia is something wrong and a number of the sleep docs
00:19:12.040 that i talked with said you know this is a totally normal thing what is pretty unnormal is this idea that
00:19:19.260 we we go to we you know stay up into the night with our electric lights go to bed at 11 get up at
00:19:25.200 seven and sleep straight through it's it's not like that normally right so let's talk about
00:19:30.880 light pollution and its effect on the ecosystem i mean we call it pollution we don't think of it as
00:19:35.940 that we think of pollution like a smog and stuff going into water but light can harm our environment
00:19:42.040 so what ways has light pollution harmed our ecosystems you know it's it's this is the issue that really
00:19:51.120 brought me to writing the end of night it's the thing that matters to me most is our impact
00:19:55.560 on ecosystems and our fellow creatures and the surprising thing is we just don't know that much
00:20:03.280 about it it hasn't been studied that much it's in the early stages and yet when you start to think
00:20:08.720 about it and another a number of biologists told me this and talked to me about this if we think about
00:20:14.660 the fact that life on earth evolved with bright days and dark nights and you know we we generally we
00:20:22.340 generally acknowledge that we need sunlight it's really important but they said you know we also
00:20:26.580 need darkness and then you think about how much light pollution there is how much uh and light
00:20:33.100 pollution is the definition essentially is the overuse and misuse of artificial light so it's just we're
00:20:39.360 using way too much we're kind of blasting it all around and essentially what that does for
00:20:44.100 nocturnal creatures and crepuscular creatures those creatures that are active at dawn and dusk is it
00:20:50.960 ruins their habitat and so they have evolved to depend on darkness for mating for migration for
00:20:59.300 feeding for all these different things and then we come along and light up the light up the night
00:21:04.580 we essentially ruin that habitat yeah so go ahead sorry oh go ahead no well i was just going to give
00:21:11.340 you know a couple prime examples in north america for example we have more than 400 species of birds
00:21:17.000 that migrate at night people don't know that you know during migration season and and in some ways
00:21:22.460 all year round at night there are there are birds moving overhead migrating and they are drawn to our
00:21:29.940 artificial lights they're drawn off course they're drawn into urban areas a lot of the birds that end up
00:21:35.940 flying into windows during the day were drawn into that area at night by our bright lights we're having
00:21:41.840 a real problem with insects being sucked out of the ecosystem because they're drawn to artificial
00:21:47.200 light at night just kind of from the lowest uh the base of the food chain insects up to the top of the
00:21:54.760 food chain we're seeing we're everywhere we look we're seeing impact of artificial lights on different
00:21:59.680 species yeah i think the most visceral example that i've seen i think it was a planet earth the
00:22:05.100 documentary of one of them about sea turtles when they hatch they use the moon or the stars
00:22:10.980 to like figure out where to go right back to the ocean but with artificial light like they're
00:22:15.900 heading towards like busy streets and they're getting run over that was probably the most visceral
00:22:20.640 example i've seen of that it's a really dramatic example you know these these sea turtles that have
00:22:26.200 evolved for over hundreds of millions of years to come on the shore lay their eggs when the when the
00:22:33.480 eggs hatch the hatchlings come up onto the beach and they have evolved to scurry toward the brightest
00:22:38.720 light on the horizon which is as you say has been the moon light or the stars on the ocean which is
00:22:44.620 obviously the way they're supposed to go now the brightest light on the horizon is the condominium
00:22:49.420 behind them or the hotel or the street light and so they come up and they head that way and they go
00:22:55.280 into the street they're run over they die of dehydration they're picked off by predators it's a real
00:23:00.160 problem and the good news is that a lot of places recognize this and people are you know watching the
00:23:06.180 beaches so that when the when the hatchlings come up they help them to the ocean and that kind of
00:23:10.400 thing but but we lose a lot of you know sea turtles are endangered anyway and we lose a lot of them
00:23:17.240 just from this light pollution and you talk about bats they're often feared because they're associated
00:23:22.520 with the nighttime right but they play a vital role in our ecosystem like they eat mosquitoes they eat
00:23:28.560 bugs and if we don't have bats we're going to have this problem with infestations of insects
00:23:33.120 right exactly bats are such a great example of everything we're talking about here because they
00:23:38.680 are associated with knights and a lot of people are afraid of them for really no i shouldn't say
00:23:45.380 no reason but any danger that a bat might carry from rabies is the prime example is way overblown and
00:23:53.560 when you compare it to the benefits that they bring to humanity we really ought to be loving bats and
00:24:00.240 and praising bats and thinking they are as cool as they really are i mean there's more than a thousand
00:24:05.600 species of bats they when you look at the pictures of them they're they're fascinating faces and the
00:24:11.320 ears and nose and then a prime example is uh the bats down in austin texas who there's uh bats who live under
00:24:20.160 the congress avenue bridge who come out and fly into the it's just this amazing emergence of millions of bats
00:24:27.440 coming out and they fly into the agriculture fields around the city and eat pests and they save the
00:24:33.920 farmers you know hundreds of millions of dollars every year huge value right huge value it's something
00:24:39.860 we ought to treasure uh and yet we're afraid of them so it's it's this this odd feeling that we have
00:24:46.920 for something that is actually helping us so uh besides the the harm on our ecosystems uh you
00:24:53.800 researched that this exposure to light 24 7 might actually have some health detriments to humans as
00:25:01.600 well so what are some of those detriments yeah there there are primarily three different areas
00:25:06.740 and the first is that all this exposure to artificial light is night is contributing to sleep disorders so
00:25:12.460 it's impacting people's ability to sleep their length of sleep sleep docs have a term they use which is
00:25:20.080 short sleep and long light so because we're exposed to so much light way into the night we end up having
00:25:27.080 these short periods of sleep and what i was told which is really compelling is that short sleep or a
00:25:32.700 lack of sleep sleep disorders are tied to every major disease that we're wrestling with these days so
00:25:38.140 obesity cancer diabetes depression you know you name it a lack of sleep seems to have a real detrimental
00:25:45.300 effect the other second area is that exposure to artificial light at night confuses our circadian
00:25:52.220 rhythms which is these these rhythms that orchestrate our organs our body's health essentially and
00:25:58.060 it was described to me as uh if you imagine the organs in your body as an orchestra each one a different
00:26:03.840 instrument the circadian rhythm is the conductor keeps the orchestra together and if you confuse that
00:26:09.520 conductor it follows that the the rest of the orchestra is going to be confused and people think oh it's
00:26:15.920 no big deal you know i can i can pull an all-nighter or i can fly to europe and i can i can function but if
00:26:21.800 you do it night after night after night or a few nights here and a few nights there it leads to real
00:26:28.740 serious issues such that the world health organization now lists working the night shift as a probable
00:26:34.940 carcinogen and the american medical association is really concerned about exposure to especially
00:26:41.500 blue light at night and the third the third area that people are really nervous about is that it seems
00:26:48.140 like so we have a hormone called melatonin a lot of people have heard about that it's only produced in the
00:26:54.920 dark so if you're sleeping with the lights on you're not producing melatonin if you get up at night and you go to
00:27:00.220 the bathroom and turn on the light the production of melatonin in your body stops and what they've
00:27:05.900 found is a lack of melatonin in our bloodstream is linked to an increased risk for breast and prostate
00:27:12.580 cancer so this gets people's attention and all these things together you know what i say to people is
00:27:18.960 like every other creature on earth we evolve with bright days and dark nights you need darkness for
00:27:25.540 for health and if you're not already sleeping in the dark start tonight yeah that uh section about
00:27:32.900 the increased rates of cancer amongst nurses who work the night shift really blew my mind i had no i
00:27:38.660 mean i think we all understand if you work the night shift you're probably gonna be tired and fatigued
00:27:41.600 and that has lots of problems but the idea that it can cause cancer really sounded some alarms in me
00:27:45.900 yeah it does for a lot of people i mean cancer gets our attention and you know we should be careful to
00:27:50.600 say you know we can't say if you see a bright light at night you're going to get cancer nobody's really
00:27:56.300 saying that but it does it seems to increase the risk for cancer and when there's there's a you know
00:28:03.600 a real compelling uh argument that i detail in the book about the the link to breast cancer in women from
00:28:10.700 exposure to light at night and as as the researchers said to me you know even if it's only
00:28:15.660 10 or 15 or 20 percent of breast cancer cases that is still a lot of people and with all these things
00:28:23.080 that we're talking about you know when it comes to to exposure at light at night so much of this
00:28:28.620 exposure could be reduced you know so it's it's so often it's unnecessary exposure with high costs
00:28:37.120 so okay let's talk about that then how can we be more thoughtful about lighting at night times
00:28:42.520 obviously it's not possible just to eliminate all light at night time what can we do to light the
00:28:49.140 skies or light our way without trying i guess mitigating some of the downsides of too much light
00:28:54.080 yeah for sure there's a lot we can do and i'll just you know reiterate the idea too that
00:28:59.800 the problem isn't artificial light it's how we use it basically so we're going to have artificial light
00:29:06.080 increasingly we're going to have electronic light so light emitting diodes leds are kind of
00:29:11.960 taking over the the world and and that's good in a lot of ways they they can do a lot of a lot of
00:29:17.520 wonderful things so we're going to have light how do we use it let's use it thoughtfully and responsibly
00:29:23.460 and uh as good neighbors let's not use more than we need for example in your own house turn off your
00:29:31.080 lights at night and as i was just saying sleep in the dark try not to be staring into your screens
00:29:37.020 before you go to bed the blue light from your screen seem to have a real detrimental effect
00:29:42.300 in our communities we can have what are called light ordinances which are basically just rules
00:29:48.500 that dictate how what kind of light we'll have and how we'll use it and again the the biggest thing in
00:29:54.780 our communities and and all over is if we're going to have light let's direct it downward let's have what
00:30:00.460 we we call it shielded let's have it downward so it lights the street it lights the sidewalk
00:30:05.280 but it doesn't shine up into the sky it doesn't shine into people's eyes so those are kind of the
00:30:10.580 the basic ways i guess i would say is to in your own house be in the dark turn off your your house lights
00:30:17.340 in your communities make sure that your light is focused downward that we're not using more light than
00:30:22.380 we need and as a society then to start realizing that because some light help us helps us be safe
00:30:29.820 more light doesn't automatically make us safer are there any cities who are sort of on the forefront
00:30:35.880 of reducing light pollution or being smart smarter about lighting yeah absolutely and there's a lot of
00:30:42.000 really cool work that's being done with lighting around the world here in the states two prime examples
00:30:48.220 are in arizona flagstaff and tucson flagstaff is remarkable if you go there and a lot of this is
00:30:55.540 dictated by the uh the astronomical observatories that have been there but in flagstaff and in tucson
00:31:02.960 you will see exactly what i'm talking about which is that the lights are focused down sometimes the lights
00:31:08.660 are more uh the colors of the light are more amber colors rather than this bright blue white light
00:31:15.360 and so that's pretty remarkable to see if you go to a you know a gas station for example which are
00:31:21.680 in most of the country one of the prime examples of light pollution where gas stations and parking lots
00:31:28.240 are lit 10 times as brightly as they were only 20 years ago so we've really ramped up the lighting
00:31:35.060 in gas stations if you go to a gas station in in flagstaff or tucson it's much dimmer and at first
00:31:42.160 you're like wow it's super dim and then as you're there you just think well i have all the light i
00:31:47.040 need and there's it's not like these places are overrun by by thieves and criminals everything's
00:31:52.500 fine there's just less light some of the cities in europe like amsterdam copenhagen oslo are really
00:31:59.420 doing amazing things with their lighting lowering the levels of light putting lights actually in the
00:32:04.960 street rather than shining in your eyes so there's a lot of cool stuff we could do with lighting
00:32:09.760 that we're not doing and i think that goes along with kind of rethinking the way that we use light
00:32:15.580 at night yeah and also i guess another recommendation would be for folks to get out to a place where they're
00:32:20.820 they can experience true darkness yeah for sure because if you're i like to say you know if you're
00:32:26.500 younger than about 40 in the u.s chances are you've grown up swamped with artificial light like you don't
00:32:33.740 know what it really is to live without artificial light so having that first-hand experience of
00:32:40.660 getting out somewhere where you can see what a real sky looks like uh and then you know maybe you've
00:32:46.480 heard me talk or you or somebody has pointed this out to you kind of looking around at the lights
00:32:50.260 around you and thinking well this is kind of dumb like why do we need lights that are going up into the
00:32:55.860 sky it's not helping anybody it's not making anybody any safer we can have lighting let's just focus it
00:33:02.000 down yeah you know it inspired me there's a i want to get out to i live in oklahoma and out in the
00:33:06.640 panhandle there's a state park called black mesa which i don't think there's anything there's no light
00:33:11.960 around there i want to get out there because i don't i know i've seen the milky way once but it's
00:33:16.660 been a long long time and i want to see that again yeah absolutely and i would you know just to touch
00:33:22.500 back on where we were a little bit earlier you know a night doesn't have to be a level one on that
00:33:29.080 portal scale to be pretty amazing um you know you can have what would bring maybe a two or three or
00:33:35.100 four on that scale and you can still be awed by being out at night the problem is that most of us
00:33:42.220 honestly are way up in the seven eight nine range most of the time you know so we're just really not
00:33:47.600 we look up and we see 25 stars when really we we ought to be able to look up and see 2500 stars
00:33:54.680 that's the difference that most people don't don't realize so paul you've got a new book out
00:33:59.280 and i haven't had a chance to read it but it looks fascinating it's the same thing i love how you take
00:34:02.420 these like sort of obscure ideas things we take for granted and try to flesh things out it's about
00:34:07.800 dirt what what caused you to explore go from the night sky to exploring the ground beneath us
00:34:13.980 you know it's a it's an entirely different subject in a lot of ways but similar themes which is to say
00:34:21.780 i'm really interested in the the costs from our separation from nature and the benefits from
00:34:29.180 being connected to nature and realizing our connection to nature so you know the end of
00:34:33.840 night is about being cut off from darkness because of we're using too much artificial light
00:34:38.120 and the ground beneath us is is really about this uh firsthand experience of natural ground
00:34:45.040 we are cut off from that as well we live this kind of stunned me when i when i found this out but
00:34:51.300 we live um in in the civilized west 90 to 95 percent of our time inside or in our cars and then when
00:35:00.260 we walk outside we walk on pavement a lot of us so we've lost a literal connection with the natural
00:35:06.480 ground and then i started thinking about all the the really vital grounds that we don't have a lot of
00:35:14.000 us most of us don't have connection with especially like the soil that provides our food the the
00:35:20.200 grounds that give us our our energy even the grounds that give us our spirit and that was one of the
00:35:25.520 great things about the book is to learn not only about soil and pavement but also to go to places
00:35:32.920 like gettysburg and talk about hallowed grounds and to other places talk about sacred ground what do we
00:35:39.240 mean by those places and why are they important so it's another it was a really fun book to write
00:35:45.380 and hopefully takes people uh in a lot of neat places well great well paul where can people learn
00:35:51.000 more about your work i have a website i would invite people to uh it is uh paul hyphen bogard
00:35:57.680 so p-a-u-l hyphen b-o-g-a-r-d and um you can read about the books and find out lots of good stuff
00:36:04.460 fantastic well paul bogard thank you so much for your time it's been a pleasure
00:36:07.300 it's been my pleasure thanks very much my guest is paul bogard he's the author of the book
00:36:12.480 the end of night you can find that on amazon.com and bookstores everywhere he's also got a new
00:36:16.340 book out about the ground beneath us it's called the ground beneath it's about dirt you can find
00:36:20.440 out more about his work at paul-bogard.com also check out our show notes at aom.is
00:36:25.340 slash bogard where you find links to resources where you can delve deeper into this topic
00:36:28.920 well that wraps up another edition of the art of manliness podcast for more manly tips and advice
00:36:45.800 make sure to check out the art of manliness website at artofmanliness.com if you enjoy the
00:36:49.660 show i've gotten something out of it i'd appreciate it if you give us a review on itunes or stitcher
00:36:52.960 that helps us out a lot as always thank you for your continued support and until next time this is
00:36:56.940 brett mckay telling you to stay manly