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A look at the brains of a rat, monkey, chimp and human.
A look at humans' unique ability to reflect upon events.
A brief look at the cooperative and social nature of humans.
A look at the difference between human language and others.
A look at the ways in which monkeys and apes are similar to humans.
Archaeologist John Shea explains early humans' first tools.
An overview of how insight and imagination distinguish humans from others.
An introduction to MRI scans.