AUSTIN, Texas — The oldest known vocal organ of a bird has been found in an Antarctic fossil of a relative of ducks and geese that lived more than 66 million years ago during the age of dinosaurs. (more…)
Tag Archives: dinosaurs
AUSTIN, Texas — Dinosaurs are often depicted in movies as roaring ferociously, but it is likely that some dinosaurs mumbled or cooed with closed mouths, according to a study published in the journal Evolution. (more…)
On a summer evening in 1993, Professor John Ostrom, a paleontologist at the Yale Peabody Museum of Natural History, had a chance to see one of his discoveries spring to life.
“Jurassic Park,” Steven Spielberg’s film adaptation of Michael Crichton’s bestselling novel, was setting box-office records. Both the filmmaker and the novelist had consulted Ostrom. The tale’s primary dinosaur antagonists, the vicious Velociraptors, were based on Deinonychus — a Cretaceous predator whose fossilized remains Ostrom discovered in Montana in 1964. (more…)
The impact decimated slow-growing evergreens and made way for fast-growing, deciduous plants, UA researchers say, and that provides an explanation for those fall colors.
The meteorite impact that spelled doom for the dinosaurs 66 million years ago decimated the evergreens among the flowering plants to a much greater extent than their deciduous peers, according to a study led by UA researchers. The results are published in the journal PLoS Biology. (more…)
The gravity of the world’s current extinction rate becomes clearer upon knowing what it was before people came along. A new estimate finds that species die off as much as 1,000 times more frequently nowadays than they used to. That’s 10 times worse than the old estimate of 100 times.
PROVIDENCE, R.I. [Brown University] — It’s hard to comprehend how bad the current rate of species extinction around the world has become without knowing what it was before people came along. The newest estimate is that the pre-human rate was 10 times lower than scientists had thought, which means that the current level is 10 times worse. (more…)
A study that originated in the lab of UA biologist Brian J. Enquist with UA alum John Grady suggests dinosaurs had a metabolism that was neither warm- nor cold-blooded, but somewhere in between.
Dinosaurs dominated the Earth for more than 100 million years, but all that remains today are bones. This has made it difficult to solve a long-standing and contentious puzzle: Were dinosaurs cold-blooded animals that lumbered along or swift warm-blooded creatures like those depicted in “Jurassic Park”? (more…)