Why We Are Losing the Night Sky

It never gets dark anymore. Not REALLY dark, anyway. Not like it used to. Light pollution is not only making it more difficult to see the night sky, but it's also affecting our health. For the past century and a half, since the dawn of electric light, we’ve been losing our connection to the night. We need artificial light for modern society, of course.

Season 7 Episode 16 Length 10:26 Premiere: 07/14/19

Recent Episodes

How HIV Started a Century Before Anyone Noticed

S14 E8 Length 27:32 Premiere Date 07/16/26

The New Kind of Heat Humans Can’t Handle

S14 E7 Length 21:23 Premiere Date 07/01/26

Scientists Finally Figured Out What Love Is For

S14 E6 Length 16:47 Premiere Date 06/11/26

We've never seen an atom. But we know what they look like.

S14 E5 Length 16:47 Premiere Date 05/28/26

Infinity isn’t a number. It's something much weirder.

S14 E4 Length 10:51 Premiere Date 05/14/26

Something Strange Happens When You Flatten the Earth…

S14 E3 Length 24:25 Premiere Date 04/21/26

Specials

The Mystery of Earth's Disappearing Giants

Length 21:29 Premiere Date 09/16/21

Dung Beetles: The Poop-Rolling Stargazers of the Serenget

Length 17:08 Premiere Date 09/01/21

These Butt-Tickling Ants Are Endangered Butterfly Bodyguards

Length 20:59 Premiere Date 08/18/21

These Death-Eating Scavengers Are Real Life-Savers

Length 29:33 Premiere Date 08/04/21

Elephant Moms Carry the Wisdom of Generations

Length 25:36 Premiere Date 07/21/21

Are Some Species More Important Than Others?

Length 25:47 Premiere Date 07/08/21

The Surprising Species That Everything Else Depends On

Length 25:47 Premiere Date 07/08/21

The Superb Owl!

Length 04:11 Premiere Date 02/02/17

The 12 Days of Evolution - Complete Series!

Length 17:43 Premiere Date 01/26/17

The Surprising Origin of Thanksgiving Foods

Length 05:09 Premiere Date 11/13/16

Do Animals Mourn Their Dead?

Length 04:17 Premiere Date 10/23/16

Season 7 Episodes

Show Episodes

Show Clips & Previews

Could You Be a Chimera? (ASL)

S7 E31 Length 09:43 Premiere Date 06/21/19

This Could Change the Future of Space Travel

S7 E30 Length 11:30 Premiere Date 12/30/19

The Strange (Unexpected) Reason Ice is Slippery

S7 E29 Length 07:20 Premiere Date 12/17/19

Recycling Is Broken. Here’s How We Can Fix It.

S7 E28 Length 11:11 Premiere Date 12/10/19

I Tried Eating Bugs… Here's What I Learned

S7 E27 Length 14:55 Premiere Date 11/23/19

Evolution Fails in the Human Body

S7 E26 Length 11:53 Premiere Date 11/19/19

This Face Changes the Human Story

S7 E25 Length 13:11 Premiere Date 10/21/19

What If We Could See Nature In Infrared?

S7 E24 Length 08:51 Premiere Date 10/25/19

What Color Is A Banana?

S7 E23 Length 08:46 Premiere Date 11/09/19

What’s In a 20,000 Year-Old Cube of Ice?

S7 E22 Length 11:20 Premiere Date 10/07/19

The History of Money (From Barter To Bitcoin)

S7 E21 Length 09:36 Premiere Date 09/29/19

7 Scientific Urban Legends Debunked!

S7 E20 Length 11:24 Premiere Date 09/06/19

Why Don't Birds Lay Square Eggs?

S7 E19 Length 07:21 Premiere Date 08/19/19

How Blind People See With Sound

S7 E18 Length 16:07 Premiere Date 08/11/19

Why do Trees Talk to Each Other?

S7 E17 Length 05:27 Premiere Date 07/27/19