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Throughout history, human fleas have been one of our closest companions; the irritating bedfellows of everyone from kings and queens to the poorest in society. Brett Westwood discovers how the flea has been a carrier of disease, causing suffering on an enormous scale. But, despite being a danger and a pest, their proximity has led to us to try to understand them and find humour in them.

The esteemed British naturalist Dame Miriam Rothschild was one of the world's leading experts on fleas and led an investigation into how they propel themselves to such speed and distance from their minuscule frame. As parasites, their ability to jump onto hosts to suck their blood led to fleas being charged with sexual energy in the 16th century. Poets wrote entertainingly intimate poems of their jealousy that the flea could jump onto areas of a beautiful woman that they themselves would be unable to reach.

The comedic role of the flea continued into the era of the flea circus when they pulled miniature metal chariots several times their weight and their role as performers didn't end there - leading on into early cinema and even tourism. They may have been often overlooked but fleas have had a stark impact on our lives.

Revised and shortened repeat.

Archive Producer: Andrew Dawes for ´óÏó´«Ã½ Audio in Bristol