Even if you think you learned everything that you needed to know way back in biology class, everyone has knowledge gaps. And often you’re not even aware that they exist. There are tons of things we ...

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 ...

There are a few body parts that remain the same size from the moment we're born until the end of our lives. The human body is an incredible structure of balance, precision, and evolution. While most ...