Ancient eagles may have shaped human evolution

A three-year-old Australopithecus africanus, known as the 'Taung child,' lived 2.8 million years ago in South Africa. Fossil evidence suggests it may have been attacked by a large bird, possibly an eagle, based on puncture marks near its eye sockets.

Scientists believe giant birds ruled the skies for nearly 50 million years, shaping ecosystems and possibly influencing the evolution of early humans. These birds, including teratorns and Haast's eagle, were apex predators that hunted large prey.

Research by primatologist Scott McGraw indicates that raptors may have frequently preyed on primates, including early humans. Evidence from modern primate remains in Ivory Coast's Taï Forest shows similar damage to the Taung child's skull, suggesting a long-standing predator-prey relationship.

The need to avoid predation by birds and other animals may have driven key evolutionary adaptations. Standing on two legs could have helped early humans spot threats, while cooperation and group living offered protection against ambush predators like eagles.

Large group sizes may have also contributed to the development of language. Coordination beyond line of sight, such as warning of a predator, may have necessitated more complex communication systems, a precursor to human language.

Teratorns, which lived in the Americas, could have inspired myths like the Thunderbird. These massive birds, with wingspans up to 6 meters, coexisted with early humans and large mammals like mammoths and ground sloths until the end of the Pleistocene epoch.