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Why Your Grandma Is an Evolutionary Mystery

This is one of the weirdest mysteries of human evolution: Why do we have grandmas? From menopause to our slow maturation and super-long lifespans, humans are quite unique in the animal kingdom. Could grandma be an evolutionary secret weapon? Or is she just a quirky side effect of living long lives?

Season 13 Episode 2 Length 17:11 Premiere: 03/21/25

Recent Episodes

The Intelligence Test Where Ants Beat Humans

S13 E17 Length 14:52 Premiere Date 02/05/26

Everything I Thought I Knew About Flavor Was Wrong

S13 E16 Length 19:50 Premiere Date 01/15/26

The Scientific Lie That Damaged Generations of Men

S13 E15 Length 20:05 Premiere Date 12/18/25

Inside the Vault Where They Keep the Dinosaur Apocalypse

S13 E14 Length 22:36 Premiere Date 12/04/25

Mars Used to Be Blue... Then Something Happened

S13 E12 Length 11:08 Premiere Date 10/23/25

Be Smart about Autism

S13 E11 Length 36:47 Premiere Date 10/02/25

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 13 Episodes

Show Episodes

Show Clips & Previews

The Intelligence Test Where Ants Beat Humans

S13 E17 Length 14:52 Premiere Date 02/05/26

Everything I Thought I Knew About Flavor Was Wrong

S13 E16 Length 19:50 Premiere Date 01/15/26

The Scientific Lie That Damaged Generations of Men

S13 E15 Length 20:05 Premiere Date 12/18/25

Inside the Vault Where They Keep the Dinosaur Apocalypse

S13 E14 Length 22:36 Premiere Date 12/04/25

Mars Used to Be Blue... Then Something Happened

S13 E12 Length 11:08 Premiere Date 10/23/25

Be Smart about Autism

S13 E11 Length 36:47 Premiere Date 10/02/25

Why Seedless Fruit Is a Disaster Waiting To Happen

S13 E10 Length 14:51 Premiere Date 08/21/25

The Randomness Crisis Threatening the Internet

S13 E9 Length 21:13 Premiere Date 07/31/25

Blood Types Are Weirder Than You Think

S13 E8 Length 16:20 Premiere Date 07/10/25

How Feathered Dinosaurs Accidentally Invented Flight

S13 E7 Length 16:18 Premiere Date 06/19/25

What Could We See with a Planet-Sized Telescope?

S13 E6 Length 16:00 Premiere Date 05/27/25

The Argument for De-Extinction: Explained

S13 E5 Length 26:19 Premiere Date 05/08/25

Will Earth Run Out of Oxygen

S13 E4 Length 16:53 Premiere Date 04/24/25

What’s Inside the Oldest Rocks in the World?

S13 E3 Length 16:40 Premiere Date 03/31/25

Why Your Grandma Is an Evolutionary Mystery

S13 E2 Length 17:11 Premiere Date 03/21/25

The Weird Science That Lets Insects Fly in the RainThe Weird Science That Lets Insects Fly in the Rain

S13 E1 Length 11:06 Premiere Date 02/21/25

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