Three previously unknown species of rodent-like mammals that once scurried alongside dinosaurs in what is now northern Alaska have been identified.
Scientists say a tooth discovered in a Russian cave has provided the oldest evidence of "complex" dental care.
American Association of Endodontists reports that only 27% of U.S. adults know they have 30 minutes to save a knocked-out tooth, despite strong attachment to their natural teeth.
Well-preserved fossils of the oldest known species allowed researchers to find new information about the ancient animal.
Its skull, broad and triangular in shape, had a pointed beak resembling that of parrots.
Through fossilized tooth enamel, scientists are reconstructing the diets and landscapes that existed millions of years ago. We really are what we eat.
"It turns out the world's most famous octopus fossil was never an octopus at all."
Scientists say sharks fed on whales in north European waters in prehistoric times, say scientists.
The plant-eater Tanyka was a “living fossil” when it stalked the Earth around 275 million years ago.