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Discovery: Sexual Nature 3/3

February 18th, 2013

Episode 243 of 607 episodes

When a couple are expecting a baby, the big question is: girl or boy? Adam Rutherford explores the many ways Nature decides that question. If you're a human, a kangaroo or a komodo dragon, it's in the sex chromosomes. If you're a crocodile, it's the temperature of your eeg. And if you're a fish, it can be one sex first and, later in the life, the other.

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