Many have heard that rats and cockroaches can survive even a nuclear explosion. But the most viable organism on Earth is the tardigrade, a tiny creature ranging in length from 0.1 to 1.5 mm. Tardigrades look like annelids, with 8 pairs of very primitive legs and a chitinous body. Interesting fact, the tardigrade can resist temperatures ranging from -270C (-273C is absolute zero) to 151C. The tardigrade is not affected by radiation 1000 times higher than the lethal dose and the pressure is 6 times higher than at the bottom of the deepest ocean (7000 atmospheres). Interestingly, tardigrades can remain latent for decades and re-emerge when conditions are favorable. These animals can go into a coma when their body size is reduced by 85%. There are cases when they came to life after hundreds of years of hibernation in museum exhibits of mosses. However, with constant activity, tardigrades live only one year.
There are over 1000 species of tardigrades, and they are found in vast areas around the world, from the summits of the Himalayas to the bottom of the oceans. But for all their vitality, tardigrades suffer from one problem: environmental pollution. Because of this, they are more common in rural areas than in cities.