![Ancient extinction of giant Australian bird points to humans](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_tS6EGiqQhTAhycu04IyQ1Q5EBU3Pfmy2GHIaP0YS3lXXmAt9UIC-3uQNu_jzu-csYcOAAmvgsGUiFqdqcoKmJmCOB6Y8bWsy7NQXIi3Ue28dSXwc3t1QVDVlyxQ9T3QYsJPnQupPp1HPbU_k36uLuu7E5JcdeMwah7nxqBPK6W124HAufTcRR2R1Wo=s0-d)
The first direct evidence that humans played a substantial role in the extinction of the huge, wondrous beasts inhabiting Australia some 50,000 years ago -- in this case a 500-pound bird -- has been discovered by a University of Colorado Boulder-led team.
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