Fossil records indicate merely flightless birds survived when T rex was wiped off the Earth
Birds had to rediscover flight after the meteor strike that killed off the dinosaurs, scientists say.
The cataclysm 66 m 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 woodlands burned around the world, the only birds to survive were flightless emu-like species that lived on the ground.
” Seeming at the fossil record, at plants and birds, there are multiple lines of proof is recommended that the forest canopies collapsed ,” said Regan Dunn, a member of the team from the Field Museum in Chicago, US.” Perching birds ran extinct because there were no more perches .”
The six to nine-mile-wide meteor struck the Earth off the coast of Mexico, releasing a million times more energy than the largest atom bomb. Hot debris raining from the sky is thought to have triggered global wildfires immediately after potential impacts.
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