Saturday, 1 October 2011

Human Ancestor May Put Twist in Origin Story


Ker Than
Published September 8, 2011


Two million old bones named Australopithecus sediba was was discovered in the Malapa region of South Africa in 2008. Scientistc think that they have the proof that shows that people in the past were able to make and use tools. The team that investigated this thinks they found a fossilized peace of skin; it is the first time that they found soft tissue that recovered from an early human ancestor. The team started an experiment called the Malapa Soft Tissue Project which is help to conclude if they do have skin. These bones are very important because it is from a time period called circa, which is two million years ago, and they don't know a lot about that time period. The A. sediba skeletons are of a boy child in his early teens and a female thought to be roughly 30 years old. They possibly died within days or maybe even hours and maybe have been related. They fell into a gulf going to rest in an underground cave, over time the area was filled with breccia, and cemented stone which helped keeping the remains protected.

Also surprising are A. sediba's hands and brain, which when used together, can create and use stone tools. The overall shape and organization of A. sediba's brain was similar to the modern humans but it was very small, only a quarter the size of a modern human brain, or a little larger than the brain of a chimpanzee. This study is showing our brains began reorganizing before there was any big change in the size of it. 

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