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Proteins Preserved on 3.8 Million-Year-Old Eggshell Are a Portal to 'Deep Time'

The Olduvai Gorge, where the eggshells were found. (Photo: Noel Feans/CC BY 2.0) There's a scale at which time stops making instinctive sense. What we call "ancient" civilizations existed just a few thousand years ago. The oldest piece of DNA that's been sequenced is 700,000 years old. The earliest remains of humans outside of Africa are dated to 1.7 million years in the past; the hominins who preceded humans were walking upright 6 million years ago.
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