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#169 Why the US is shooting down UFOs; the science behind period cravings; saving the UK’s rivers

The world, the universe and us

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Why Doesn't Everyone Have Afro Curls?

Researchers suggest that as people spread out of africa the selection pressure would have been lost or relaxed. That would then allow variations to emerge from generation to generation by random chance and that's probably why we don't all have tightly curled hair today. Tina Lissisi told our reporter Michael LePage she said when it comes to anthropology it has this history that's tightly woven with colonialism and racism what kind of Victorian gentleman would have thought that a trait he did not possess could be critical to human evolution?

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