Season 4
The 40 Million-Year-Old Ecosystem In Your Mouth
Dental calculus is the only part of your body that actually fossilizes while you're alive!
The 40 Million-Year-Old Ecosystem In Your Mouth
Why The Paleo Diet Couldn't Save The Neanderthals
Here's why these skilled toolmakers, hunters, and foragers' population disappeared.
Why The Paleo Diet Couldn't Save The Neanderthals
When It Was Too Hot for Leaves
For the first 80 million years of plants' existence, leaves didn't exist. Here's why.
When It Was Too Hot for Leaves
How Ancient Whales May Have Changed the Deep Ocean
Here's how the evolution of ocean-going whales affected deep-ocean communities.
How Ancient Whales May Have Changed the Deep Ocean
When Mammals Only Went Out At Night
Scientists discover dinosaurs and tiny mammals' sleep habits are different than thought.
When Mammals Only Went Out At Night
How a Mass Extinction Event Created the Amazon
The history of how the Amazon's revolution began in just one day.
How a Mass Extinction Event Created the Amazon
How a Supervolcano Ignited an Evolutionary Debate
Discover the effects of the Toba supervolcano.
How a Supervolcano Ignited an Evolutionary Debate
The Creature That Stumped Darwin
The Toxodon fossils help reveal the mystery surrounding evolution.
The Creature That Stumped Darwin
The Story of How the Starfish Got its Arms Reminds us that Animals have Deep Histories.
How the Starfish Got Its Arms
Where Are All the Medium-Sized Dinosaurs?
Learn More about the Very Rare Medium-Sized Dinosaurs.
Where Are All the Medium-Sized Dinosaurs?
The Island of the Last Surviving Mammoths
The very last mammoths that ever lived experienced what’s known as a mutational meltdown.
The Island of the Last Surviving Mammoths
The Traits That Spawned the Age of Mammals
Some Mammal Traits Show Up a Lot Earlier and in Things That Weren’t Mammals at All.
The Traits That Spawned the Age of Mammals
Did These Giant Sloths Poop Themselves to Death?
Find out if Sloths Really Did Poop Themselves to Death.