Video: sailfish ‘slasher film’ sheds light on evolution of group hunting

Video: sailfish ‘slasher film’ sheds light on evolution of group hunting Once a year for 5 years, a crew of researchers would set sail off the coast of Cancun, Mexico, to locate frigate birds flocking and diving just above the ocean’s surface. The scientists weren’t actually interested in the birds—the animals merely served as a smoke signal for the mayhem unfolding belo...