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899 Scientists discover ancient single-celled ancestors still live on in your blood

ScienceDaily
ScienceDaily · 05/27/2026 01:37 EDT

Scientists uncovered evidence that human blood cells may trace their origins back to single-celled ancestors that lived 700 million years ago. By rebuilding the evolutionary family tree of blood cells, the team revealed how today’s immune system grew from some of Earth’s earliest life forms.

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