walking chimp

DO THE TWIST  Chimps walk on two legs with surprising flexibility, rotating their upper bodies much as people do when walking, a new study finds. Researchers say this discovery supports the view that hominids walked in a humanlike way more than 3 million years ago.

warped spacetime

GETTING A GRIP ON GRAVITY  Einstein's general theory of relativity explains gravity as a distortion of space (or more precisely, spacetime) caused by the presence of matter or energy. A massive object generates a gravitational field by warping the geometry of the surrounding spacetime. 

prairie voles

PAIR-BOND  Just 24 hours in each other's company without mating can be enough to bond a pair of prairie voles for life.

fizzy chemical

BUBBLE POWER  A fizzing chemical leaves a jet of bubbles in its wake as it races through a liquid. Such bubbles could propel drugs into wounds to stop blood loss. 

Science News