1: Eons What Happened to the World's Biggest Beaver?

2: Eons The Reign of the Hell Ants

3: Eons The Pandemic That Lasted 15 Million Years

4: Eons When We First Talked

5: Eons The Return of Giant Skin-Shell Sea Turtles

6: Eons The Genes We Lost Along the Way

7: Eons Our Bizarre, Possibly Venomous, Relative

8: Eons How Worm Holes Ended Wormworld

9: Eons How Humans Became (Mostly) Right-Handed

10: Eons How Chilis Got Spicy (and Why We Love the Burn)

11: Eons How To Survive the Little Ice Age

12: Eons When Crocs Thrived in the Seas

13: Eons When Trees Took Over the World

14: Eons How Weasels Got Skinny

15: Eons Where Are All The Squid Fossils?

16: Eons Did These Giant Sloths Poop Themselves to Death?

17: Eons The Traits That Spawned the Age of Mammals

18: Eons The Island of the Last Surviving Mammoths

19: Eons Where Are All the Medium-Sized Dinosaurs?

20: Eons How the Starfish Got Its Arms

21: Eons The Creature That Stumped Darwin

22: Eons How Pollination Got Going Twice

23: Eons How a Supervolcano Ignited an Evolutionary Debate

24: Eons How a Mass Extinction Event Created the Amazon

25: Eons When Mammals Only Went Out At Night

26: Eons How Ancient Whales May Have Changed the Deep Ocean

27: Eons How Dinosaurs Coupled Up

28: Eons When It Was Too Hot for Leaves

29: Eons Why The Paleo Diet Couldn't Save The Neanderthals

30: Eons The Fossil Record In Your Mouth

31: Eons When Pterosaurs Walked