For Early Hominins in Africa, Many Ways To Take a Walk

摘要

If the bureaucrats of Monty Python's Ministry of Silly Walks were to establish a hall of fame they might consider inducting Australopithecus sediba, who walked with its weight balanced oddly on the inside edge of its soles about 2 million years ago in South Africa. Or they might ponder the contrasting way two types of australopithecines strolled across the same region of Ethiopia's Rift Valley about 3.4 million yearsago. While one strode much like humans dotoday, the other tucked in its opposable bigtoe and swayed from side to side. "Thetake-home message here this morning is.