Growing human organs in laboratories has rapidly moved from the annals of fiction into the realm of actual science. But ...

It is rare for a tooth infection to spread to other parts of the body. However ... symptoms should seek immediate medical attention: The mouth is full of bacteria from foods, saliva, and plaque.

The Bible's lex talionis – "Eye for eye, tooth for tooth, hand for hand, foot for foot" (Exodus 21:24-27) – has captured the human imagination for millennia.