Rejuvenation

Botox has long been used for more than just smoothing out wrinkles. From eyebrow lifts and lip shaping to relieving teeth grinding and correcting a gummy smile – these are the uses that have become especially popular in recent years, and what is important to know before the injection.

TIME magazine's list of the world's 12 most prominent longevity researchers reveals where the science of life extension is heading. Also: who might make next year's list? The science of longevity, a new section.