A lack of sleep not only increases tiredness and irritability, but it cause you to get fat. Yes, after being deprived of one night’s rest, group study participants went on to purchase food that was higher in calories and weighed almost a fifth more than their normal shop. That’s not all, scientists from Uppsala University in Sweden found that poor or no sleep resulted in raised levels of a hormone that is linked to boosting hunger. Continue reading for more fun and geeky science facts that might surprise you.

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