Researchers determine that a primate’s tooth root, and not just its crown, can yield reliable information about body size, but the relationship between root surface area and diet isn’t as clear.

Scientists find human DNA preserved in lice cement from the heads of South American mummies.

More than two-thirds of mammals in Africa and the Arabian Peninsula went extinct during the Eocene-Oligocene transition some 30 million years ago, a study finds.

A handful of high schoolers prompt scientists to develop a new approach for calculating the size of the ancient behemoth.

A new study finds that the extinct European cave bear’s large sinuses represent a tradeoff between hibernation length and the flexibility of their diets.

A roughly 99-million-year-old piece of amber from northern Myanmar contains the skull of what appears to represent the smallest known dinosaur of the Mesozoic era.

Researchers categorize the different jaws of piscivorous fishes.

Dental calculus provides a look into the diets of 42 people who died during the Great Irish Famine.

Scientists engineered a new material that could be developed for use in treating tooth decay.

Microbial species that are commonly associated with oral diseases in modern humans are unreliable proxies for determining tooth health status in ancient samples, a new study finds.

See a close-up of the deep-sea dragonfish’s transparent teeth.

A mollusk grows magnetic teeth so tough they can grind down rocks.  

Galagadon’s tiny teeth look like the spaceships in its namesake video game from the early 1980s.

A study of tiny monkey skulls and teeth suggests that shrinking body size didn’t crowd out wisdom teeth during evolution.

Tooth fossils of cave dwellers represent the first known instance of our species inhabiting a rainforest.

Once mated, female cabbage white butterflies (Pieris rapae) use their "vagina dentata" to rip through the hard encasing of a male’s ejaculated spermatophore. 

Scientists repurpose an Alzheimer’s drug to enhance the ability of stem cells to repair dental damage in mice.

Fossil analysis suggests members of at least one dinosaur species started out with full sets of teeth, only to lose them in adulthood and develop beaks instead.

Intricate, digital maps of animals’ teeth, created using the same geographical tools used by mapmakers, may help researchers determine the diets of extinct species.