Evolution & Origins of Life

Why Is the Little Toe Considered Vestigial?

Do Apes Have Chins? Why It’s a Human Trait

What Dinosaurs Lived in South America?

Are Turtles Older Than Dinosaurs? An Evolutionary History

Mimicking: A Strategy for Survival and Social Connection

What Period Did Parasaurolophus Live In?

What Is Coalitionary Behavior and Why Does It Evolve?

What Are Postzygotic Barriers to Reproduction?

Genetic Diversity and Adaptation in Viral Quasispecies

What Are Tetrapods? Definition, Ancestry, and Major Groups

What Is Trait Variation and Why Is It Important in Biology?

Are There Black Owls? The Science of Melanism in Birds

The Pygostyle: Anatomy, Function, and Avian Evolution

Sivapithecus: The Orangutans’ Ancient Ancestor

Where Are Crinoids Found? From Ancient Seas to Modern Oceans

Is a Zebra a Donkey? How They Are Related but Different

Evolution in the United States: A National Debate

What Are Life History Traits in Biology?

What Organism First Evolved Photosynthesis?

Danuvius guggenmosi: An Ancient Ape That Walked Upright