Episode Overview
To grasp the origins of hearts, we must journey back to the earliest shared ancestor of all creatures with a heart. This process spanned hundreds of millions of years, evolving through numerous variations of a fundamental design before arriving at the heart we possess today.
Show Information
Season 3 Episodes 39
1.
When Humans Were Prey
2.
How Blood Evolved (Many Times)
3.
The Humans That Lived Before Us
4.
The Island of Shrinking Mammoths
5.
The Evolution of the Heart (A Love Story)
6.
How 7,000 Years of Epic Floods Changed the World
7.
The Island of Huge Hamsters and Giant Owls
8.
The Giant Bird That Got Lost in Time
9.
When We First Made Tools
10.
When Giant Scorpions Swarmed the Seas
11.
When We Tamed Fire
12.
The Mystery Behind the Biggest Bears of All Time
13.
The Croc That Ran on Hooves
14.
When We Took Over the World
15.
The Ghostly Origins of the Big Cats
16.
The History of Climate Cycles (and the Woolly Rhino) Explained
17.
The Hellacious Lives of the "Hell Pigs"
18.
How Evolution Works (And How We Figured It Out)
19.
When the Synapsids Struck Back
20.
When Ichthyosaurs Led a Revolution in the Seas
21.
When We Met Other Human Species
22.
How Volcanoes Froze the Earth (Twice)
23.
How Earth's First, Unkillable Animals Saved the World
24.
When Giant Deer Roamed Eurasia
25.
Was This Dinosaur a Cannibal?
26.
The Missing Link That Wasn’t
27.
The Raptor That Made Us Rethink Dinosaurs
28.
When Bats Took Flight
29.
How Pterosaurs Got Their Wings
30.
When Giant Lemurs Ruled Madagascar
31.
When Antarctica Was Green
32.
The Case of the Dinosaur Egg Thief
33.
When Hobbits Were Real
34.
Were These Monsters Inspired by Fossils?
35.
How We Domesticated Cats (Twice)
36.
When Giant Hypercarnivores Prowled Africa
37.
Why Male Mammoths Lost the Game
38.
The Forgotten Story of the Beardogs
39.
The Fuzzy Origins of the Giant Panda
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