The human body has always been something of a two-legged calliope—a sound effects machine capable of an almost unlimited range of noises. Some are pretty easy to understand—the whistle, the ...

Head over to our Facebook page and ask us your oddest health, medical or human behavior question. We may answer it in an upcoming post. Today's question: Why is cracking my knuckles so addictive?

Researchers have created an early map of some of the human body's estimated 37.2 trillion cells. Each type of cell has a unique role, and knowing what all the cells do can help scientists better ...