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Newly discovered birdlike dinosaur is oldest raptor ever found in South America

Relative of Velociraptor rewrites evolutionary charts The recent discovery of a 90-million-year-old dinosaur in Patagonia demonstrates that dromaeosaurs, a group of carnivorous theropods that includes Velociraptor and is closely related to birds, originated much earlier than previously thought. ...

Young dinosaurs roamed together, died together

... A herd of young birdlike dinosaurs met their death on the muddy margins of a lake some 90 million years ago, according to a team of Chinese and American paleontologists that e...

Four, three, two, one . . . pterosaurs have lift off

...heedlessly and wrongly lumps these extinct flying lizards in with dinosaurs. Even paleontologists assumed that because the creatures flew, they were birdlike in many ways, such as using only two legs to take flight. Now comes what is believed to be first-time evidence that launching some 500 pounds of...

New meat-eating dinosaur from Argentina had bird-like breathing system

...r-filled bones are the hallmark of the bellows system of breathing in birds. Alcober noted, "Despite its huge body size and lack of a breastbone or birdlike ribcage, this meat-eater had lungs that already functioned quite a bit like a bird's." Aerosteon provided the evidence needed to seal the connection ...

Ultrasonic frogs can tune their ears to different frequencies

...Medical School). The discovery was made when researchers examined the eardrums of an unusual frog, Odorrana tormota , which communicates by making birdlike calls in the audible and ultrasonic frequency ranges. Previous research by two of the authors showed that the frog produces and responds to ultrasonic...

Killer whales, blind bats, discriminating dolphins, mating birds

... in an amphibian: the concave-eared torrent frog ( Amolops tormotus ), found in Huangshan Hot Springs, China. The males of the species produce diverse birdlike melodic calls with strong ultrasonic components, and the females respond with similar calls, enabling the males to locate them with extraordinary accu...

Protein fragments sequenced in 68 million-year-old Tyrannosaurus rex

...na State University, and colleagues found that extracts of T. rex bone reacted with antibodies to chicken collagen, further suggesting the presence of birdlike protein in the dinosaur bones. The mere existence of such exceedingly ancient protein defies a longstanding assumption. When an animal dies, prot...

Dinosaurs -- stones did not help with digestion

... in order to improve the digestive process. There is another group of dinosaurs, however, whose remains of gastric stones can be linked up with a birdlike gastric mill, according to Oliver Wings' research. From these dinosaurs known as theropods today's birds developed. The gastric mill could therefore h...

Frog’s ear canal may provide insights for understanding human hearing loss

... middle ear to be shorter, and as a result, lighter in weight. Scientists have known for several years that A. tormotus males produce high-pitched, birdlike calls that extend into the ultrasonic range. What remained to be tested was whether the ultrasounds were a byproduct of the frog's sound-production sy...

Did feathered dinosaurs exist?

... debate on the origin of birds, the authors say. However, mounting evidence suggests that "a possible solution to the disparate data is that Aves plus birdlike maniraptoran theropods (e.g., microraptors and others) may be a separate clade, distinctive from the main lineage of Theropoda, a remnant of early avi...
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