Brain differences in children and teens who experiment with drugs early show up before they take their first puff or sip ...

(Not everyone in the scientific community agreed that he had effectively aged, then rejuvenated, the mice.) He used a technique for which the Japanese stem-cell scientist Shinya Yamanaka had won a ...

Sesame Street: Elmo’s Bedtime Story Best for Ages 1-3. Sesame Street: ... scientific perspective. Sure, younger kids might get bored after a minute or two (the video is under five minutes long).