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Curiosity: It Helps Us Learn, But Why?   |   

New research suggests that curiosity triggers chemical changes in the brain that help us better understand and retain information.

What Are The Origins Of The Universe?  |   

David Christian explains the history of the universe from the big bang, and how humans occupy little more than a millisecond on that cosmic timeline.

Where Did Human Beings Originate?  |   

Louise Leakey describes her family's long search for early human remains in Africa, and how unlocking that mystery is the key to understanding our past and our future.

Are All Human Beings Related?  |   

Geneticist Spencer Wells describes how he uses DNA samples to trace our individual origins going back 2,000 generations.

Why Did Humans Migrate Out Of Africa?  |   

Geneticist Spencer Wells tells the story of early humans, and our eventual migration from Africa.