What do a large brown bear and this microscopic invertebrate have in common? The walk.

Looking at the tardigrads (Philum: Tardigrada) in 1777, the Italian naturalist Lazzaro Spallanzani gave them this name which means "slow walkers" because of their funny way of walking that reminds one of bears (hence their nickname, "bears"). 'water"). These animals live in the most diverse environments, including mosses and lichens, on the rocks, at the bottom of seas and lakes. They feed mainly on vegetable juices and are famous and studied for their exceptional resistance to the most adverse conditions: they can withstand high and low pressures - they are also found in the oceans at great depths - extreme temperatures, lethal radiation levels for any other living species and even survive in space for about ten days.

Do you know what the man's survival limits are?