As every medical student comes to learn when first dissecting the human body at medical school, our limbs are almost entirely composed of muscles.
It turned out last week that scientists have been wrong for 350 years about how sperm swim.
Biologist Robert Waltzer briefly details the engineering wonder that permits oxygen to be carried by the blood.
An insidious kind of brainwashing goes on without your awareness, day and night. And you couldn’t live without it.
The kingfisher bird has to dive after fish rapidly without busting its beak. Japanese scientists looked into the physics of this, and redesigned the noses of their bullet trains.