Nature Live Online: Period Drama

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Humans are one of the few mammals that have periods. Our closest relatives the apes and monkeys menstruate, but the other mammals that menstruate are not closely related to us at all.

Why do some animals have periods and some others don't? Is the answer bleeding obvious or bloody complicated? Join science communicator Cristina Torrente and Museum scientist Natalie Cooper on a chat about periods in nature.

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