Limits Assembly

Teaching: Leading Learning

A Flea - as drawn by Hooke (image via Wikimedia commons) A Flea – as drawn by Hooke (image via Wikimedia commons)

Fleas are remarkable creatures. They are usually between 1.5 and 3mm long, but they can jump 33cm horizontally and 18cm straight up into the air. If a flea was a person, this would be the equivalent of jumping straight up to the clock face on Big Ben, or clean from one end of Wembley Stadium to the other.

Apparently the key is jumping off with your toes, rather than your knees, as this video shows. Worth noting for sports day, perhaps?

What is even more remarkable about the flea, though, is that this quite extraordinary physical ability can be limited by one really simple intervention.

If you put fleas into a jar with a lid on for three days, they will only jump half the height they are capable of. In that time, they will learn that this is how high…

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