Variations in the skull shape of vultures have been found to coincide with the preferred method each species uses to feed on a carcass. Learning more about the form and function of living species is ...

This is a fossil skull of the terror bird Andalgalornis, compared with the skull of a modern-day golden eagle and a human skull for scale. Andalgalornis was an extinct, 4.5-feet-tall, flightless ...