Sal Khan clarifies some points on evolution and intelligent design. [9:01]

Hank guides us through the process of natural selection, the key mechanism of evolution. [12:45]

Hank gets real with us in a discussion of evolution - it's a thing, not a debate. Gene distribution changes over time, across successive generations, to give rise to diversity at every level of biological organization. [11:44]

John and Hank teach you about how human primates moved out of Africa, and how humans evolved. [16:14]

Introduction to how groups of organisms evolve and how natural selection can lead to evolution. [17:39]

See evidence of how life began on Earth and how it has changed over time. [4:10]

This animation features the anole lizards as an example of how a single species can split and multiply into many different species with distinct traits. [2:38]