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- Season 0 2008-11-27
- Season 1 1960-11-06
- Season 2 1970-01-01
- Season 3 1970-01-01
- Season 4 1970-01-01
- Season 5 1970-01-01
- Season 6 1970-01-01
- Season 7 1970-01-01
- Season 8 1970-01-01
- Season 9 1970-01-01
- Season 10 1970-01-01
- Season 11 1970-01-01
- Season 12 1970-01-01
- Season 13 1970-01-01
- Season 14 1970-01-01
- Season 15 1970-01-01
- Season 16 1970-01-01
- Season 17 1970-01-01
- Season 18 1970-01-01
- Season 19 1970-01-01
- Season 20 1970-01-01
- Season 21 1970-01-01
- Season 22 1970-01-01
- Season 23 1970-01-01
- Season 24 1970-01-01
- Season 25 1970-01-01
- Season 26 1970-01-01
- Season 27 1970-01-01
- Season 28 1970-01-01
- Season 29 1970-01-01
- Season 30 1970-01-01
- Season 31 1970-01-01
- Season 33 1970-01-01
- Season 34 1970-01-01
- Season 35 1970-01-01
- Season 36 1970-01-01
- Season 37 1970-01-01
- Season 38 1970-01-01
- Season 39 1998-10-08
- Season 40 1999-10-04
- Season 41 2000-10-05
- Season 42 2001-10-02
- Season 43 2002-10-17
- Season 44 2003-10-22
- Season 45 2004-09-16
- Season 46 2005-08-31
- Season 47 2007-10-11
- Season 48 2008-10-16
- Season 49 2009-10-11
- Season 50 2010-09-23
- Season 51 2011-10-13
- Season 52 2012-10-18
- Season 53 2013-10-03
- Season 54 2014-10-09
- Season 55 2015-10-15
- Season 56 2016-10-06
- Season 57 2017-09-24
- Season 58 2018-09-23
- Season 59 2019-09-20
- Season 60 2020-11-06
- Season 61 2021-11-05
- Season 62 2023-01-06
- Season 63 2024-01-04
Season 63 Episode
- Season 52 The Buffalo Wolves
- Season 52 Babies: Born to be Good?
- Season 52 Nuts About Squirrels
- Season 52 The Norse: An Arctic Mystery
- Season 52 Lights Out!
- Season 52 David Suzuki's Andean Adventure
- Season 52 Zapped: The Buzz About Mosquitoes
- Season 52 Shattered Ground
- Season 52 Meet the Coywolf
- Season 52 The Fruit Hunters: Evolution of Desire (Part 1 of 2)
- Season 52 The Fruit Hunters: Evolution of Desire (Part 2 of 2)
- Season 52 Billion Dollar Caribou
- Season 52 The Beaver Whisperers
- Season 52 The Beetles Are Coming
- Season 52 The Man Who Tweeted Earth
The Nature of Things - Season 52 Episode 5 Lights Out!
7.50 48 minutes Twelve hours of light. Twelve hours of dark. For our entire history we have lived and worked in rhythm with the sun. But all that changed with the invention of artificial light. Light fixtures, computer and television screens - all of these have allowed us more time to live, work, play and shorten our nights. But at what cost? Are we putting our health at risk? We explore how the type of light we are exposed to in the hours between dusk and bedtime can play tricks on our bodies and cancel the healthful benefits naturally triggered by the absence of light.
