Sentences with phrase «university paleobiologist»

DePaul University paleobiologist Kenshu Shimada's rendering of a Pseudomegachasma shark hypothesizes it had a large mouth with many small teeth.

Not exact matches

A 100,000 - year - long cold spell triggered the growth of glaciers almost down to tropical latitudes, says Lauren Sallan, a paleobiologist at the University of Pennsylvania.

According to a group of paleobiologists led by the University of Pennsylvania's Lauren Sallan, it's plain wrong.

«People previously thought that you needed some threshold level of oxygen for evolution to work really well,» says Carl Simpson, a paleobiologist at the University of Colorado in Boulder who was not involved in the work.

When paleobiologist Tim White of the University of California, Berkeley, and colleagues described a new human ancestor named Ardipithecus ramidus — or «Ardi» — they challenged many evolutionary assumptions.

With a few bones of his own, vertebrate paleobiologist John A. Ruben of Oregon State University contends that dinosaurs are more akin to komodo dragons than cockatiels.

One of the authors of the study, Kenshu Shimada, a paleobiologist at DePaul University, said Rhinconichthys are exceptionally rare, known previously by only one species from England.

But in March 2017, Ph.D. student Matthew Baron and vertebrate paleontologist David Norman of the University of Cambridge, along with paleobiologist Paul Barrett of the Natural History Museum in London, proposed upending that long - standing arrangement.

For example, the scrape marks could have been made when meat - eating predators, such as the mighty Acrocanthosaurus, scraped their powerful hind legs on the ground to make noise and warn other males — of either the same or a different species — to stay away, says Timothy Isles, a paleobiologist at the University of Portsmouth in the United Kingdom.

For instance, the renowned paleobiologist Svante Pääbo, then at the University of California at Berkeley, claimed to have recovered nuclear DNA from an Egyptian mummy.

That's why University of Oxford paleobiologist Derek Siveter was elated when he and colleagues found the oldest and most complete sea spider fossil to date in Herefordshire, United Kingdom.

Nicholas Butterfield, a paleobiologist at the University of Cambridge in the United Kingdom, acknowledges that the researchers did attempt to account for error.

But that shape doesn't necessarily mean that the feather's former owner could fly, says study coauthor Ricardo Pérez - de la Fuente, a paleobiologist at the Oxford University Museum of Natural History.

And their giant size may have even promoted greater productivity, «by bringing up nutrients from deep waters as they dive and resurface,» suggests Geerat Vermeij, a paleobiologist at the University of California, Davis, who was not involved in the work.

Paleobiologist Simon Conway Morris of the University of Cambridge in the United Kingdom began by suggesting that astrobiology might be considered «the study of that which does not exist.»

Alex Dececchi, a paleobiologist at Queen's University in Kingston, Canada, agrees with the authors» suggestion that Zhenyuanlong's feathers and wings might have been used for sexual display or other kinds of signaling.

Based on scaling up smaller eruptions like the 1991 eruption of Mount Pinatubo in the Philippines, volcanologist Stephen Self of The Open University in Milton Keynes, U.K., and paleobiologist Michael Rampino of New York University in New York City put the cooling at only 3 ˚ to 5 ˚C.

Matt Friedman, a paleobiologist at the University of Oxford in the United Kingdom, thought he could estimate just how likely it was that there are more ancient cichlid fossils out there.

This position is shared by Guillermo Navalon, a Spanish paleobiologist at the University of Bristol who plans to finish his Ph.D. in 2019.

This paper will likely be very influential, adds Lawren Sack, a plant physiologist and ecologist at the University of California, Los Angeles, as paleobiologists can now better estimate photosynthesis for fossils from deep time.

The study provides «important constraints on the interpretation of rare fossils, including some of our earliest ancestors,» writes paleobiologist Derek Briggs of Yale University's Peabody Museum of Natural History in an e-mail.

«This species is a very important intermediate, a transitional form,» says Javier Ortega - Hernández, a paleobiologist at the University of Cambridge in the United Kingdom, who wasn't involved in the research.

Ksepka's new analysis is «a solid piece of work,» says Mark Witton, a paleobiologist at the University of Portsmouth in the United Kingdom.

But that cuddly theory doesn't fly with vertebrate paleobiologist John A. Ruben of Oregon State University.

«I think the interpretation is overblown and not supported by the data,» says John Alroy, a paleobiologist at the University of California, Santa Barbara.

Donoghue, a paleobiologist at the University of Bristol in the United Kingdom, and his colleagues started with previously collected genetic data on more than 100 plant and algal species.