Tardigrades are microscopic organisms usually found living amongst mosses and lichens. These tiny animals lack bones but have a nervous system, and are capable of living in extremely harsh conditions. They have been known to withstand temperatures as low as -272.95 degrees C (-459.31 F) and as high as 150 degrees C (302 F). They can also survive high speeds, high pressures, and ultraviolet radiation. Though they seem indestructible, they only live a few months, but have been around for about 600 million years. Tardigrades are microscopic organisms usually found living amongst mosses and lichens. These tiny animals lack bones but have a nervous system, and are capable of living in extremely harsh conditions. They have been known to withstand temperatures as low as -272.95 degrees C (-459.31 F) and as high as 150 degrees C (302 F). They can also survive high speeds, high pressures, and ultraviolet radiation. Though they seem indestructible, they only live a few months, but have been around for about 600 million years.