Do you have any idea how many emergencies are resolved inside your body every day without your conscious knowledge or control? Here are just 3 examples.
The cochlea in the inner ear, where sound is transmitted to the brain, has a spiral shape resembling a snail shell. It's not just to save space, researchers have found.
"Heidelberg Man" has been a modern name imposed on certain fossil humans that have been unable to speak for themselves. Now, their bones appear to overlap with Neanderthals. But don't modern humans have Neanderthal DNA? Do the distinctions make any sense?