Tardigrades are small, water-dwelling, segmented animals with eight legs, no bigger than 1,2 millimeter long.
They are the most impressive of the organisms that are considered to be biologically immortal.
An European Space Agency (ESA)’s experiment has shown that these invertebrates can survive in the vacuum of space and they are the first animals known to be able to survive the harsh combination of low pressure and intense radiation found in space, and even they’re still found alive with intense pressure, huge doses of radiation, and years of being dried out. They won’t succumb to death even you boil them, freeze them, or put them into any harsh conditions. They are such tough guys that you could never beat them down. In fact, they are the greatest survivors in the nature as they have long been known as the virtual indestructibility animals ever survived on Earth.