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David Attenborough's Conquest of the Skies:

The Surprising Reason Birds First Grew Feathers

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The Surprising Reason Birds First Grew Feathers

Short | 02:26

When birds first grew feathers 150 million years ago, their function was not necessarily to help with flight.

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After ruling the skies for about 60 million years, insects were joined by a new group of creatures: vertebrates. The pioneers of the backboned flyers were the prehistoric pterosaurs, followed by a group of dinosaurs that acquired feathers. Finally, after a global extinction event, birds and the newly emerged bats took command of the skies. Join naturalist David Attenborough as he investigates the jungles of Borneo and the volcanic ash of China to track the evolution of these remarkable flying animals.

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