Have you ever wondered why aliens in most science fiction movies looked strangely like humans? A head, two eyes, two arms, two legs... Hollywood aliens are indeed suspiciously anthropomorphic, but is it all that a mistake, mainly due to our own biases as humans?

In this video, evolutionary biologist Richard Dawkins and director of New York's Hayden planetarium Neil deGrasse Tyson discuss the features that might be expected from alien life. The outcome may surprise you!

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