Tardigrades, sometimes adorably known as water bears or moss piglets, are microscopic animals capable of enduring conditions that would typically be fatal for most life forms, ranging from extreme temperatures, both high and low pressures, lack of air, radiation, dehydration, and even the vacuum of space.

No, at least not to humans. Other micro-organisms in their environment should be on notice though; those claws aren’t for show. While most tardigrades are herbivorous, not all of them are, and they will eat you if you are smaller than they are and you are within reach of their claws.