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Mammal ancestors laid eggs, and this 250-million-year-old fossil finally proves it

In the aftermath of Earth's most catastrophic extinction event, one unlikely survivor rose to domina...

SCIENCE April 14, 2026

Mammal ancestors laid eggs, and this 250-million-year-old fossil finally proves it

In the aftermath of Earth's most catastrophic extinction event, one unlikely survivor rose to dominate a shattered world: Lystrosaurus.

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In the aftermath of Earth's most catastrophic extinction event, one unlikely survivor rose to dominate a shattered world: Lystrosaurus.

Author: ScienceDaily

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