You might think that the human body has many holes, but that number shrinks when you stop to consider what counts as a hole. When you purchase through links on our site, we may earn an affiliate ...

For centuries, the nature of a fever — and whether it's good or bad — has been hotly contested. In ancient Greece, the physician Hippocrates thought that fever had useful qualities, and could cook an ...

While the human body doesn’t replace itself every seven years in a uniform way, it does engage in constant renewal.