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Our ancestors diet shifted much earlier than thought
Our ancestors made the shift from a diet based on trees and shrubs to grass-based foods that include not only grasses and their roots, but also insects or animals that ate grass roughly 400,000 years earlier than experts previously thought, says new research.
New York: Our ancestors made the shift from a diet based on trees and shrubs to grass-based foods that include not only grasses and their roots, but also insects or animals that ate grass roughly 400,000 years earlier than experts previously thought, says new research.
The diet shift is one of an array of changes that took place during the Pliocene era -- 2.6 million to 5.3 million years ago --
when the fossil record indicates human ancestor species were starting to spend more time on the ground walking on two feet, said study lead author Naomi Levin from Johns Hopkins University in Baltimore, US.
The shift toward a grass-based diet marked a significant step toward the diverse eating habits that became a key human characteristic, and would have made these early humans more mobile and adaptable to their environment.
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