Cosmic collision led to rise of mammals

Cosmic collision led to rise of mammals

Dinosaurs’ death 65M years ago gave us a chance
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This artist’s rendering shows a hypothetical placental mammal ancestor – a small, insect-eating animal. This critter first popped in the world a little more than 65 million years ago – just after the cosmic crash which is theorized to have caused the extinction of non-avian dinosaurs.
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