Sciencedaily reports that there are direct evidences  that humans played a substantial role in the extinction of the huge, wondrous beasts inhabiting Australia some 50,000 years ago  a 500-pound bird has been discovered research team.The flightless bird, known as Genyornis newtoni, was nearly 7 feet tall and appears to have lived in much of Australia prior to the establishment of humans on the continent 50,000 years ago, said. The evidence consists of diagnostic burn patterns on Genyornis eggshell fragments that indicate humans were collecting and cooking its eggs, thereby reducing the birds’ reproductive success.

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