Add Yahoo as a preferred source to see more of our stories on Google. illustration of a human arm with the palmaris longus muscle highlighted in red Does the human body contain any truly useless parts ...

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 ...

For most of human history, the inner workings of the human body were a secret. Over the last few centuries, the invention of the microscope and other scientific techniques allowed scientists to learn ...

Vestigial structures are body parts that we've evolved to no longer need. The natural selection process dictates that we keep the traits that continue to serve a purpose while the others become ...

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, ...

Discover 25 amazing facts about the human body you may not be aware of. From your brain's fat content to daily saliva ...

For hundreds of years, from at least the Renaissance through the Victorian era, medicine in England, Italy, France, and other European countries routinely involved the use of the dead human body.