If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Evolution and natural selection

6 videos

Introduction to evolution and natural selection

VIDEO 17:39 minutes
Ape Clarification - that they have no tails

Ape clarification

VIDEO 1:04 minutes
Ape Clarification - that they have no tails

Intelligent design and evolution

VIDEO 11:35 minutes
The argument that evolution speaks to being the most "intelligent design"

Evolution clarification

VIDEO 9:01 minutes
Clarifying some points on evolution and intelligent design

Natural selection and the owl butterfly

VIDEO 13:29 minutes
How the "Owl Butterfly" may have gotten the spot on its wings.

Variation in a species

VIDEO 19:51 minutes
How variation can be introduced into a species.