Birds had to relearn flight after meteor wiped out dinosaurs

Birds had to relearn flight after meteor wiped out dinosaurs

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Birds had to rediscover flight after the meteor strike that killed off the dinosaurs, scientists say. The cataclysm 66m years ago not only wiped out Tyrannosaurus rex and ground-dwelling dinosaur species, but also flying birds, a detailed survey of the fossil record suggests. As forests burned around the world, the only birds to survive were…