'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 ...
Is there a Neanderthal in the house?
Bunions bothering you? How about lower back pain, or impacted wisdom teeth?
New materials of caturoid fish discovered in China
In a newly published articles, researchers from the Institute of Vertebrate Paleontology and Paleoanthropology describe new materials of caturoid fish—Gymnoichthys inopinatus, from the Middle Triassic Guanling ...
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 ...
Nature-inspired advance for treating sensitive teeth
Taking inspiration from Mother Nature, scientists are reporting an advance toward preventing the tooth sensitivity that affects millions of people around the world. Their report on development of the substance, ...
Tracing humanity's African ancestry may mean rewriting 'out of Africa' dates
New research by a University of Alberta archeologist may lead to a rethinking of how, when and from where our ancestors left Africa.
Study: Like a tree, growth rings show lobster age
Scientists have finally figured out how to determine the age of a lobster.
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.
Nanoparticles provide reinforcement for invisible brackets in orthodontics
Investigadores de la Universidad Carlos III de Madrid (UC3M) colaboran con la empresa CEOSA-Euroortodoncia en el desarrollo de una nueva generación de brackets de plástico transparente con nanopartículas ...
Swiss Army Knife teeth secret to seal's success
Biologists have shown how an advanced set of teeth give Antarctic leopard seals the biological tools to feast on prey of all sizes, from penguins to tiny krill.