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Tag: "dinosaurs" at biology news

Definitive evidence found of a swimming dinosaur

...des the most compelling evidence to-date that some dinosaurs were swimmers. The 15-meter-long trackway, located...cluding aquatic birds." The question of whether dinosaurs could swim has been researched for years. Until now, however, very little hard evidence existed docu...

How to look at dinosaur tracks

...tudied a range of larger tracks from the family of dinosaurs that includes the T. Rex and the tridactyl, and provide a guide for interpreting the effects of many different types of erosion on these invaluable impressions. “Well-preserved vertebrate tracks in the rock record can be an invaluable source of info...

Amphibians in losing race with environmental change

...f millions of years - since before the time of the dinosaurs and through many climatic regimes - the massive, worldwide decline of amphibians can best be understood by their inability to keep pace with the current rate of global change, a new study suggests. The basic constraints of evolution and the inabili...

Diminishing dinosaur steps saved by laser and laptop

...ts, because it gives an insight into the way these dinosaurs moved and the environments in which they lived. ...mprinted in a vertical cliff face, the surface the dinosaurs travelled across millions of years ago would have been flat. The School of Earth, Atmospheric and...

Dinosaur hearing, listening to muscle noise, quieter cubicles

How did the hearing of dinosaurs compare to that of present-day animal species" Wh...t the hearing abilities of extinct animals such as dinosaurs and early mammals. According to the University of Maryland's Robert Dooling ( dooling@psyc.umd.edu ...

Fused nasal bones helped tyrannosaurids dismember prey

...ica Polonica. Tyrannosaurids differ from other dinosaurs in the great robustness of their teeth and skulls,...is extensive fusion increased the strength of such dinosaurs as the T. rex and helped them apply powerful bites that could splinter bone. With other carnivorous ...

Despite their heft, many dinosaurs had surprisingly tiny genomes

They might be giants, but many dinosaurs apparently had genomes no larger than that of a mo...to gauge the genome sizes of 31 species of extinct dinosaurs and birds, whose bone cells can be measured from the fossil record. The researchers, at Harvard U...

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

...nt and still controversial proposal that birds and dinosaurs are evolutionarily related. The HMS and BIDMC researchers, working with scientists at North Carolina State University, report their findings in the April 13 Science. "Most people believe that birds evolved from dinosaurs, but that’s all based on the...

Prehistoric mystery organism verified as giant fungus

... But even if Prototaxites hadn’t been eaten by the dinosaurs and elephants that came much later, they probably grew too slowly to rebuild from regular disturbances of any kind, Boyce said. "It’s hard to imagine these things surviving in the modern world," he said....

Dinosaur extinction didn't cause the rise of present-day mammals, claim researchers

...the Mass Extinction Event (MEE) that wiped out the dinosaurs 65 million years ago prompted the rapid rise of th...rs. However, throughout the Cretaceous epoch, when dinosaurs walked the earth, these mammal species were relatively few in number, and were prevented from divers...

Novel experiment documents evolution of genome in near-real time

...ook at the fossil record to study how evolution of dinosaurs and other animals occurred over millions of years, but in the case of the E. coli bacterium, new technology has given us the ability to observe evolution as it is occurring over a matter of days," said Bernhard Ø. Palsson, the senior author of the st...

Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census

...aking 1990 census on the diversity of discoverable dinosaurs upward by 50%, offering a brighter outlook about the number of dinosaurs waiting to be found. His findings also add evidence that dinosaur populations were stable, and not ...

Researchers give name to ancient mystery creature

...s lived about 60 million years ago, soon after the dinosaurs went extinct, in a period known for its rapid diversification of small mammals. Based on careful examination of tooth and jaw fragments that have been unearthed over the past 30 years, the University of Alberta researchers have now determined Horolod...

Dinosaurs -- stones did not help with digestion

The giant dinosaurs had a problem. Many of them had narrow, pointed te...p, crush and thereby also to digest food. Giant dinosaurs from the Jurassic and Cretaceous period (200 million to 65 million years ago) such as Seismosaurus a...

Ancient birds flew on all-fours

...nsidered the best evidence that birds evolved from dinosaurs since it had both feathers and a bird-like wishbon...imal's flight. It wasn't until several four-winged dinosaurs in China were described in 2002 that researchers began to re-examine Archaeopteryx's legs. "The ide...

'Fruit fly dating game' provides clues to our reproductive prowess

There's growing evidence that the dinosaurs and most their contemporaries were not wiped out b...nk ?many straight to extinction. As for how the dinosaurs were affected, that's a bit harder to say specifically, since dinosaurs did not leave a lot of fossi...

Far more than a meteor killed dinos

There's growing evidence that the dinosaurs and most their contemporaries were not wiped out b...nk ?many straight to extinction. As for how the dinosaurs were affected, that's a bit harder to say specifically, since dinosaurs did not leave a lot of fossi...

Steep oxygen decline halted first land colonization by Earth's sea creatures

...time, until oxygen levels rose appreciably, before dinosaurs grew to their familiar gargantuan sizes. "Dinos...at, and it is that the air sac breathing system in dinosaurs and their descendants, modern birds, is more efficient than systems used by other organisms," Ward s...

Trotting with emus to walk with dinosaurs

...se, "We unfortunately can't go out and see walking dinosaurs today. Or can we?" After scouring the dinosaur...ing unusual. Instead of speculating about what the dinosaurs were doing, they went hunting for a modern analog animal they could study to help decipher the track...

Protowings may have helped bird ancestors cover rough terrain

... other considers ancestral birds to be terrestrial dinosaurs that developed powered flight from the ground up. An article by Kenneth P. Dial and two co-authors in the May 2006 issue of BioScience summarizes experimental evidence indicating that ancestral protobirds incapable of flight could have used their pr...

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