How birds got their wings: Fossil data show scaling of limbs altered as birds originated from dinosaurs

April Flowers for redOrbit.com - Your Universe Online Scientists are certain that sometime around 150 million years ago birds originated from a group of small, meat-eating theropod dinosaurs called maniraptorans. According to recent studies conducted around the world, the maniraptorans were very bird-like, with feathers, hollow bones, small body sizes and high metabolic rates. What remains unclear is at what point the forelimbs evolved into wings, making it possible for the maniraptorans to fly. To answer that question, McGill University professor Hans Larsson worked with former graduate student Alexander Dececchi to examine fossil data, greatly expanded in recent years, from the period marking the origin of birds. Their findings, published in the journal Evolution, revealed that throughout most of the history of carnivorous dinosaurs, limb lengths showed a relatively stable scaling relationship to body size. This scaling relationship remains stable despite the 5,000-fold difference in mass between the sma

How birds got their wings: Fossil data show scaling of limbs altered as birds originated from dinosaurs

Birds originated from a group of small, meat-eating theropod dinosaurs called maniraptorans sometime around 150 million years ago. Recent findings from around the world show that many maniraptorans ...

Wed 18 Sep 13 from Phys.org

How birds got their wings: Fossil data show scaling of limbs altered as birds originated from dinosaurs, Tue 17 Sep 13 from ScienceDaily

Changes in limb size gave dinosaurs a 'leg up' into flight

MONTREAL, Sept. 17 (UPI) -- A change in dinosaurs' limbs in relation to their bodies eventually led to the development of wings and their evolution into birds, Canadian researchers say.

Tue 17 Sep 13 from UPI

Avian Evolution: How Raptor Limbs Became Bird Wings

April Flowers for redOrbit.com - Your Universe Online Scientists are certain that sometime around 150 million years ago birds originated from a group of small, meat-eating theropod dinosaurs ...

Wed 18 Sep 13 from RedOrbit

How Birds Got Their Wings

Fossil data show scaling of limbs altered as birds originated from dinosaurs

Tue 17 Sep 13 from Newswise

How birds got their wings, Tue 17 Sep 13 from AlphaGalileo

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