Although the Stegosaurus dinosaur was over 9 metres long, its brain was only the size of a walnut.

An average adult produces about half a litre of flatulent gas per day, resulting in an average of about fourteen occurrences of flatulence a day.

Some dogs can predict when a child will have an epileptic seizure, and even protect the child from injury. They're not trained to do this, they simply learn to respond after observing at least one attack.

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