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flag Scientists confirm mammal ancestors laid eggs via fossilized embryo analysis.

flag Scientists in South Africa have confirmed that mammal ancestors laid eggs, using advanced imaging to study a 250-million-year-old fossilized embryo inside a soft-shelled egg. flag This discovery resolves a long debate about the reproductive habits of early therapsids, specifically the tusked, pig-sized plant-eater Lystrosaurus, and suggests egg-laying helped these creatures survive mass extinctions.

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