Humans Got Their Flexible and Sturdy Joints From Fishes, Evidence Found in 400 Million-Year-Old Jawed Fish Evolution has ...

Jef Akst was managing editor of The Scientist, where she started as an intern in 2009 after receiving a master’s degree from Indiana University in April 2009 studying the mating behavior of seahorses.

While the common ancestor of vertebrates with synovial joints is still a mystery, the oldest specimen with evidence of these ...

The most ancient fish were jawless, and since our whole group has ... Organisms have only two types of traits: primitive and derived. Primitive traits are those inherited from distant ancestors.