In 2008, British historians tracked down the world's oldest joke — a fart joke from 1900 BC.

Here are the world's 10 oldest jokes, found during research led by humor expert Dr Paul McDonald at the University of Wolverhampton.

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In 2008 a group of historians from the UK were commissioned to unearth the oldest joke ever written down.

The study was led by humor expert Dr Paul McDonald from the University of Wolverhampton.

The list reveals that humor has changed a lot in some respects, but, as the world's oldest joke shows, that toilet humor is here to stay.