![3D rendered illustration of a waterbear](/media/47734/waterbear-3d-medically-accurate-illustration-alamy-tycw9y-sebastian-kaulitzki.jpg?anchor=center&mode=crop&heightratio=0.5622047244094488188976377953&width=647&rnd=132242635140000000)
Credit: Sebastian Kaulitzki / Alamy Stock Photo
Tardigrades, sometimes known as water bears, are some of the toughest animals known. They’re able to withstand mind-blowingly extreme temperatures and pressure. Mosses also shelter invertebrates like woodlice and molluscs that are food for birds and small mammals.