These so-called tweezers can take out single molecules or structures from individual cells — such as mitochondria from nerve cells (illustrated here).

With their long, flexible noses, elephants can eat whole tree branches like they were stems of broccoli. But they use a newfound tactic to pick up tiny bits of food, scientists have just shown.  

T. rex didn’t have the ability to clamp its jaws to crush bones, like some mammals do today. Instead, it used its powerful bite and strong teeth to pulverize the bones of its prey.

Donna Strickland, seen here, is one of three scientists to win this year’s Nobel Prize in physics. Strickland also is only the third woman in history to win this physics award.