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Human ancestor a real knuckle-dragger
Human ancestor a real knuckle-dragger Scientists taking a new look at the fossil remains
of the earliest known hominid have discovered that early humans
probably scooted along on their knuckles much like chimps do,
rather than walking fully upright. "Lucy", as the fossilized
hominid is known, lived in Africa between 3 and 4.1 million years
ago. She represents an early hominid line called "Australopithecus
afarensis". Until recently, no-one had thought to examine the wrist
bones of early hominid fossils and when Brian Richmond and David
Strait of George Washington University did, they discovered that
Lucy's wrist bones were stiff, like a chimp's. This suggests that
early humans did not have free use of their hands for carrying food
or using weapons or tools. Like chimps and gorillas, Lucy could not
flex her hands backwards like modern humans do. This discovery
suggests that using hands more flexibly came after early humans
developed the mode of walking upright. 28 MARCH 2000
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