Evolution & Origins of Life

What Is a Homologous Structure in Evolution?

What Is the Lifespan of a Killifish?

The Evolution of Merychippus: The Three-Toed Horse

How Powered Flight Evolved in Insects, Birds, and Bats

Endless Forms Most Beautiful: The Diversity of Life

Directional vs. Disruptive Selection: How Populations Change

How Does Comparative Anatomy Support Evolution?

What Animals Lived During the Jurassic Period?

What Is the Oldest Fossil Ever Found?

How Smart Are Humans Compared to Animals?