Your body is made up of trillions of cells—but what do you really know about them? Take our lab quiz and determine your CIQ (cell identification quotient).
December 1, 2011|
Cut off a newt’s tail or a leg, or remove a lens from its eye, and it grows back. However, whether newts can continue to do this throughout their lives, or lose the ability as they get older, has remained a mystery.