The theory of human evolution postulates that modern homo sapiens’ ancestors were ancient apes. The team of four scientists — Thomas C. Prang, Kristen Ramirez, Mark Grabowski, and Scott A. Williams studied the skeletal remains of Ardipithecus ramidus, also known as Ardi,which dated back to 4.4 million years old. Comparing the shape of Ardi’s hand to several other hand specimens …
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