'True grit' erodes assumptions about evolution
Dining on field grasses would be ruinous to human teeth, but mammals such as horses, rhinos and gazelles evolved long, strong teeth that are up to the task.
Helicoprion: Scientists solve mysteries of ancient 'shark' with spiral-toothed jaw
(Phys.org)—Using CAT scans and making 3-D virtual reconstructions of the jaws of the ancient fish Helicoprion, Idaho State University researchers have solved some of the mysteries surrounding large spiral ...
How the whale got its teeth
Whales are mammals, but they don't look like the mammals living around us, as they have a triangular fluke for tail, no hind legs and no body hair. And inside their mouths, their teeth are unfamiliar too ...
Study: There were more small meat-eating dinosaurs than first thought
University of Alberta researchers used fossilized teeth to identify at least 23 species of small meat-eating dinosaurs that roamed western Canada and the United States, 85 to 65 million years ago.
Study questions informative value of dental microwear for dietary habits of extinct species
(Phys.org)—Dental microwear, the pattern of tiny marks on worn tooth surfaces, is an important basis for understanding the diets of fossil mammals, including those of our own lineage. Now nanoscale research ...
First fossil bird with teeth specialized for tough diet
Beak shape variation in Darwin's finches is a classic example of evolutionary adaptation, with beaks that vary widely in proportions and shape, reflecting a diversity of ecologies. While living birds have ...
Dinosaur science goes high-tech
They aren't your grandpa's dinosaurs. Feathered, far-flung and far more complicated, dinosaurs as revealed by today's technology look quite unlike the dumpy denizens of old-time dioramas.
Researchers work across fields to uncover information about hadrosaur teeth
(Phys.org)—An unusual collaboration between researchers in two disparate fields resulted in a new discovery about the teeth of 65-million-year-old dinosaurs.
Fossilized teeth—Duck-bill dinosaurs had plant-pulverizing teeth more advanced than horses
A team of paleontologists and engineers has found that duck-billed dinosaurs had an amazing capacity to chew tough and abrasive plants with grinding teeth more complex than those of cows, horses, and other ...
From the mouths of molluscs -- ancient snail relative found
Fossils of toothy, slug-like creatures that grazed the sea floor 500 million years ago have shed light on the origins of modern-day snails, shellfish and squid, a study said Wednesday.
Age of fossil teeth from Longgupo Cave determined with combined ESR/U-series
A Sino-France research team reported preliminary dating results of seven herbivorous fossil teeth from different archaeological layers of the lowest geological unit (C III) of Longgupo Cave site, Wushan County, ...
Great white work: Scientists renew the study of shark teeth
(Phys.org) -- The lasting legacy of the great white shark is sharp, strong and pointy: its teeth.
Ancient human ancestor Australopithecus sediba had unique diet: study
When it came to eating, an upright, 2-million-year-old African hominid had a diet unlike virtually all other known human ancestors, says a study led by the Max Planck Institute of Evolutionary Anthropology ...
Mechanism for Burgess Shale-type preservation
The Burgess Shale of British Columbia is arguably the most important fossil deposit in the world, providing an astounding record of the Cambrian "Explosion," the rapid flowering of complex life from single-celled ancestors. ...