Evolution & Origins of Life

Are Humans More Closely Related to Cats or Dogs?

When Did Terror Birds Go Extinct and Why?

How Long Have Horseshoe Crabs Existed?

Would Separated Squirrel Populations Interbreed?

What Class Are Dinosaurs in? A Look at Their Classification

How Many Mass Extinctions Have Sharks Survived?

Why Do Dogs and Seals Look Alike?

What Did Ichthyosaurs Eat? Their Diet Explained

What Is a Eurypterid? The Ancient Sea Scorpion

Are There Living Organisms in Space?

Why Is Variation Important in a Population?

What Is a Peppered Moth? The Story of Natural Selection

Do Gorillas Have Balls? The Science of Testicular Size

Why Are We Human? From Bipedalism to Symbolic Language

How Plate Tectonics Drove the Evolution of Whales

What Is Character Displacement in Biology?

What Does a Cladistic Analysis Show About Organisms?

How Did Crocodiles Survive the Asteroid?

Do Birds Have Hands? The Anatomy and Evolution Explained

How Many Toes Do Horses Have? The Evolution of the Hoof