Japanese Scientists Are Developing a Way to Regrow Human Teeth
There's a typical cycle with teeth in humans. As newborns, we have none. Slowly they come in through the painful process of teething, and eventually, as toddlers, humans have a full head of baby teeth. Then in elementary school these begin to wiggle and come loose as adult teeth push up and out of the gums. Ideally, these teeth stick with us for our whole lives, but cavities, accidents, and age can cause missing digits.