Life is a struggle. See what it takes to survive.

Survival of the fittest: Raw competition? Intense cooperation? Both are essential. Interactions between and within species are among the most powerful evolutionary forces on Earth, and understanding them may be a key to our own survival.


More about the 'Evolutionary Arms Race' episode on PBS.com

Read the book

Evolution: The Triumph of an Idea
by Carl Zimmer, Stephen Jay Gould (Introduction), Richard Hutton