The GLP is committed to full transparency. Download and review our 2019 Annual Report

From dinosaur to bird: How did the transformation take place?

| | August 28, 2018
feathered dinosaur adapt
Tianyulong confuciusi is a feathered dinosaur that belongs to the same branch of the family tree as Stegosaurus and Triceratops. Image credit: AMNH/Roderick Mickens
This article or excerpt is included in the GLP’s daily curated selection of ideologically diverse news, opinion and analysis of biotechnology innovation.

[I]n Bavaria, the Jurassic-aged limestone deposits yielded a near-perfect fossil of Archaeopteryx. It had blade-like serrated teeth and many other features across the skeleton and skull that showed it was a carnivorous dinosaur. But the crow-sized specimen was covered in the impressions of bird-like feathers. For [Thomas] Huxley, this was the transitional form he was seeking: a dinosaur on its way to becoming a bird.

[I]t was feathers that provided the final incontrovertible evidence that birds evolved from dinosaurs.

Since then, a spectacular array of small, feathered dinosaurs have been recovered from Liaoning and a few other sites around the world, which plot every conceivable evolutionary step from small fuzz-covered, meat-eating theropods through to fully feathered and winged birds.

Related article:  7 misconceptions about evolutionary psychology, including the idea that behavior is genetically determined

Beginning as simple downy filaments, they had probably originated to keep theropods warm – evidence supporting the theory that at least some dinosaurs were ‘warm-blooded’. They may also have served as ornaments. Festooned with arm feathers, smaller theropods’ plumage would have given them a degree of lift to chase flying insects.

This set of features – small with lightweight bones, rotated shoulder sockets with a furcula, turbocharged breathing systems and feathers – developed in theropods long before they took to the air and set the scene for protobirds.

Read full, original post: The feathered revolution: How dinosaurs became birds

News on human & agricultural genetics and biotechnology delivered to your inbox.
Optional. Mail on special occasions.

Send this to a friend