PhysOrg Posted May 7, 2019 Share Posted May 7, 2019 Since Darwin's era, scientists have wondered how flightless birds like emus, ostriches, kiwis, cassowaries, and others are related, and for decades the assumption was that they must all share a common ancestor who abandoned the skies for a more grounded life. View the full article Link to comment Share on other sites More sharing options...
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