Strange mammal ancestor laid huge, leathery eggs and it was key to...

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2026-04-15 17:00:14

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Strange mammal ancestor laid huge, leathery eggs and it was key to surviving the world's worst mass extinction

Using synchrotron X-ray CT scans of a fossilized, intact embryo, researchers found evidence that the plant-eating mammal Lystrosaurus laid eggs, which answers a key question about mammalian evolution.

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