ocr: a KAH F JONMLYOD me E N Balancing act Images of sinus cavities (green) anda a brain cavity (yellow) are based on CT scans of the skull of an archaic Homo sapiens. Anatomist Fred Spoor holds a cast ofa modern human inner ear, which trans- mits balance information and sound signals to the brain. Using CT scans to compare the organ with similar structures in fossil skulls, Spoor studies how our forebears maintained their balance. would say Lucy is a female is her small size, : were at least two species of australopithe- says Hausler. "Perhaps we: should change her cines at Hadar- - onel large and ...
