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.