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Before there was an extensive fossil record, DNA sequencing or even a basic understanding of genetics, there was Charles Darwin.

Today, the world commemorates the 200th birthday of a man who single-handedly revolutionized biology with an explosive theory that challenged the core of our existence.

"Darwin wrote about who we are," said historian and author James Moore, who has cowritten a new book on the famous evolutionist. "He gave us a re-interpretation of the history of humans on earth, and what we can become." Read full article »

All About Charles Darwin • Evolution