Rachel Feltman: For Scientific American’s Science Quickly, I’m Rachel Feltman. Humans have been trying to replace ailing parts of our bodies for thousands of years, turning to prosthetic limbs, ...

Add Yahoo as a preferred source to see more of our stories on Google. Does the human body contain any truly useless parts? Arguably, yes — but they might not be the ones you assume. Some body parts, ...

It seems like every week, there’s a new headline about some kind of sci-fi-esque organ transplant. Think eyeballs, 3D-printed kidneys, pig hearts. In her new book, Replaceable You: Adventures in Human ...

The human body is a machine whose many parts – from the microscopic details of our cells to our limbs, eyes, liver and brain – have been assembled in fits and starts over the four billion years of our ...