The mammal in the fossil duo is the meat-eating Repenomamus robustus, about the size of a house cat, Mallon said. But after doing their own preparations of the skeletons and analyzing the rock samples, he said they were confident that the fossil – which was found by a farmer in 2012 – was genuine, and would welcome other scientists to study the fossil as well. The study authors acknowledged that there have been some fossil forgeries known from this part of the world, which Mallon said was a concern when they started their research. “We’re used to thinking of the Age of Dinosaurs as a time when dinosaurs ruled the world, and the tiny mammals cowered in the shadows.” “This turns the old story on its head,” Brusatte said. Gang Han/Canadian Museum of Nature via Associated Press This image shows a left paw of a mammal wrapped around the lower jaw of a dinosaur.
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