Over the past few years, more and more scientific studies that refute the widely held idea that birds evolved from dinosaurs have been published in various respected journals around the globe. Such is the case with a new paper appearing in the latest issue of
Proceedings of the National Academy of Sciences
(PNAS), which throws further doubts on the decade-old idea. What the researchers behind this investigation suggest is that ground-dwelling theropod dinosaurs were not the source for the ancestors of modern birds. This work casts new doubts on the established theory of how flight evolved.
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