Evolution & Origins of Life

What Is a Biped? The Science of Walking on Two Legs

What Big Cat Are House Cats Most Like?

How Long Have Penguins Been Around?

Are Catfish Related to Sharks? A Look at Their Evolution

What Is a Homologous Trait? Definition and Examples

What Is the First Step in the Process of Speciation?

When Did Humans Start Walking Upright?

When Did the Quetzalcoatlus Go Extinct?

Why Are There So Many Species of Honeycreeper in Hawaii?

Is the Livyatan Real? The Prehistoric Giant Whale

What Is Unusual About the Elephant Population in Gorongosa Now?

When Was the First Shark Discovered?

Why Do Human Noses Stick Out? An Evolutionary Explanation

What Dinosaurs Had Feathers? The Evidence Explained

What Did Arthropleura Eat? Evidence From Fossils

What Did Darwin Notice About the Tortoises and the Mockingbirds?

What Is the Biggest Extinct Sea Animal?

What Dinosaurs Lived in the Water?

How Do Two Species Evolve From One Ancestral Species?

Are Dolphins Ungulates? Their Surprising Evolutionary Link