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Why We Only Have Ten Toes (It's a Long Story)

Today, all mammals from humans to bats have five fingers or fewer. Yes, even whales, whose finger bones are hidden in their fins. Birds have four or fewer and amphibians get the best of both worlds, often having four digits on their “hands” and five on their “feet.” But no species of vertebrates have more than five digits, let alone eight!
Season 4 Episode 22 Length 09:12 Premiere: 02/23/22

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Season 4 Episodes

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Something Has Been Making This Mark For 500 Million Years
S4 E33 Length 09:42 Premiere Date 06/15/22

We Can “Bring Back” The Woolly Mammoth. Should We?
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The Ancient Human Species With A Missing Body
S4 E28 Length 07:56 Premiere Date 04/27/22

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S4 E27 Length 07:02 Premiere Date 04/20/22

How the Smallest Animal Got So Simple
S4 E26 Length 06:52 Premiere Date 04/13/22

The Extreme Hyenas That Didn't Last
S4 E25 Length 07:50 Premiere Date 03/29/22

The Sudden Rise of the First Colossal Animal
S4 E24 Length 08:44 Premiere Date 03/22/22

When a Giant Pterosaur Ruled the European Islands
S4 E23 Length 08:50 Premiere Date 03/15/22

Why We Only Have Ten Toes (It's a Long Story)
S4 E22 Length 09:12 Premiere Date 02/23/22

How Horses Went From Food To Friends
S4 E21 Length 06:32 Premiere Date 02/16/22

How Vertebrates Got Teeth... And Lost Them Again
S4 E20 Length 08:52 Premiere Date 02/08/22

Did Eating Insects Shrink These Dinos?
S4 E19 Length 10:21 Premiere Date 01/27/22

Primates vs Snakes (An Evolutionary Arms Race)
S4 E18 Length 07:53 Premiere Date 01/18/22

How Our Deadliest Parasite Turned To The Dark Side
S4 E17 Length 08:06 Premiere Date 01/11/22

When Pterosaurs Walked
S4 E16 Length 09:38 Premiere Date 12/16/21

The 40 Million-Year-Old Ecosystem In Your Mouth
S4 E15 Length 08:14 Premiere Date 12/09/21

Why The Paleo Diet Couldn't Save The Neanderthals
S4 E14 Length 09:17 Premiere Date 12/02/21

When It Was Too Hot for Leaves
S4 E13 Length 10:11 Premiere Date 11/17/21

How Dinosaurs Coupled Up
S4 E12 Length 07:49 Premiere Date 10/28/21

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S4 E11 Length 10:05 Premiere Date 10/21/21

When Mammals Only Went Out At Night
S4 E10 Length 11:09 Premiere Date 10/07/21

How a Mass Extinction Event Created the Amazon
S4 E9 Length 07:55 Premiere Date 09/29/21

How a Supervolcano Ignited an Evolutionary Debate
S4 E8 Length 09:59 Premiere Date 09/23/21

How Pollination Got Going Twice
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The Creature That Stumped Darwin
S4 E6 Length 06:46 Premiere Date 09/01/21

How the Starfish Got Its Arms
S4 E5 Length 10:53 Premiere Date 08/24/21

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S4 E4 Length 11:01 Premiere Date 08/12/21

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