In the wake of the dinosaurs’ demise, a bizarre beast that some researchers have nicknamed “ManBearPig” lived life in the fast lane.
During the age of the dinosaurs, mammals “only got as large as a domestic cat, maybe, or a badger,” says Gregory Funston, a paleontologist at the Royal Ontario Museum in Toronto. But after an asteroid wiped out all nonbird dinosaurs about 66 million years ago, “we see this huge explosion in mammal diversity, where mammals start to get really big,” Funston says.
Paleontologists have long wondered why placentals rose to dominance. Researchers suspected that the long gestation period of this mammal lineage was an important factor. But it was unclear how long ago such long gestation evolved.. This ancient herbivore, which lived about 62 million years ago, was one of the first large mammals to appear after the dinosaur apocalypse.
“It was reproducing like the most extreme placentals do today,” Funston says, such as giraffes and wildebeests — which are on their feet within minutes of birth.gave birth to “probably just one baby in each litter, and that baby had a full set of teeth already in the mouth when it was born, and that means it was probably born with fur in place and with open eyes.”skull reveals its teeth, which had sharp ridges and grooves for chewing plants.
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