Apparently so, at least if you happen to be a mouse, reports Jeremy Thomson. The golden egg bug carries a dangerously heavy load, for no apparent reason. John Whitfield wonders what's going on. Exercise trains fat cells to give up their contents. Too much food stops them, David Adam discovers.
Blood takes a roller-coaster ride through the heart.
Cambridge researchers have announced that a daily dose of tea might fortify the bones and joints of elderly women. That's not surprising, explains Philip Ball. A survey of forelimb proportions from Tyrannosaurus to hummingbirds has come up with some surprises, Henry Gee finds. The idea that the Universe is full of planets like the Earth, capable of supporting life, has been challenged. Philip Ball reports from the First Astrobiology Science Conference At Nasa Ames Research Center.