If we look across the whole of the mammal branch of the tree of life, we find there are many groups of mammals that have evolved testicles of all different sizes. In almost all these separate cases, ...

I visited a body farm and an anatomy lab to see what the process looks like at its best. Rebecca George doesn’t mind the vultures. They remind her of toddlers as they rustle their feathers in ...

Most of us never get to see the inner workings of our bodies. Sometimes we get tiny glimpses when our bodily fluids make an appearance in the outside world—like a runny nose, a bleeding paper cut. But ...