March 15, 2012

Early Mammal Successful Before Dinos Killed

Sid Perkins, Science Now

AP Photo

By now, even schoolchildren know the story: Sixty-five million years ago, a giant asteroid slammed into Earth, ending the reign of the dinosaurs and allowing our mammalian ancestors to flourish. But a new study suggests that some of the earliest mammals were already doing well millions of years before dinos kicked the bucket. These mouse-sized creatures, known as multituberculates, appear to have started proliferating around the same time that flowering plants went through their own burst of evolution.

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TAGGED: Teeth, Mammals, Dinosaurs


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