A flea can jump over 100 times its own height, which is like a human leaping over the Eiffel Tower.

The incredible jumping ability of the flea is primarily attributed to a specialized protein known as resilin. This elastic substance is the most efficient rubber-like material known to science, capable of returning up to 97% of stored energy when released. Unlike human muscles which contract and expand relatively slowly, resilin allows for a near-instantaneous discharge of energy.Research conducted at the University of Cambridge and published in the Journal of Experimental Biology has detailed how fleas use their hind legs as multi-jointed levers. The flea compresses the resilin pads in its thorax and locks them with a physical 'catch' mechanism. This allows the insect to store energy over time and release it in a fraction of a millisecond, specifically about 1 millisecond.This explosive release generates an acceleration of approximately 100g, which is 100 times the force of gravity. To put this in perspective, a human fighter pilot typically blacks out at around 9g. The flea's jump is so fast that it exceeds the capabilities of standard muscle tissue, which cannot contract quickly enough to produce such power on its own.The comparison to the Eiffel Tower is based on the average height of a flea being about 1.5 to 3 millimeters. If a 1.8-meter-tall human had the same proportional strength, they could leap over 180 meters in a single bound. This biological engineering allows the flea to reach its host quickly and escape predators with unmatched efficiency.