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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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Curly Hair Protects the Head From the Sun

This is the biggest study ever on this subject so far but even though they did include over 9,000 people the number of people actually in each country range from just 72 to 827. The researchers are hoping to do larger studies in the future because we know that love is this universal emotion across cultures. This finding could explain why curly hair evolved in early humans when our ancestors were all in Africa and why straighter hair then emerged later as some humans moved into cooler areas.

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