Utah biologists dropped a weight on sheepskin-covered bone stand-ins. Thick wool absorbed 37% more energy, hinting that full beards may cushion blows. A 1940s experiment put a cat on a cow and popped ...

The ability to repair tissue following injuries is essential for the survival of all animals. Following wounding, the skin is repaired by activating, migrating, and dividing skin stem cells. Defects ...