Scientists have found preserved proteins in 3.8-million-year-old ostrich eggshells from Africa. These biological building blocks - bound into the eggshell - could provide genetic information up to 50 times older than any DNA.

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Scientists have found preserved proteins in 3.8-million-year-old ostrich eggshells from Africa. These biological building blocks - bound into the eggshell - could provide genetic information up to 50 times older than any DNA.