New dinosaur find rewrites history book of evolution
The discovery of an almost complete fossil skeleton at La Buitrera in Neuguen province in Patagonia has caused a stir among paleontologists.
It dates from before the break-up of the ancient super-landmass formed the northern and southern hemisphere continents of Laurasia and Gondwana.
Scientists now think dromaeosaurs in the separated continents took different evolutionary paths. That divergence might have led to flight evolving twice - once in birds and once among the Gondwanan dromaeosaurs.
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