Researchers took teeth from eight different groups and analyzed them as they believe the evolution of tooth shape takes place slowly.

Imagine walking through a bustling aquarium, surrounded by the vibrant life of the sea. You pause in front of a tank filled with sleek sharks and shimmering salmon. In a surprising twist of biological ...

A recent series of studies suggests that the brains of birds, reptiles and mammals all evolved independently — even though ...

Fish don’t exist. In her novel “Why Fish Don’t Exist,” Lulu Miller points out that a true “fish” clade containing an ancestor and all its descendants is an unrealizable dream, awkwardly grouping ...

While the common ancestor of vertebrates with synovial joints ... which raises the possibility that they appeared with the evolution of bones. While cartilage and bone are both connective tissue ...