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Scientists found an embryo fossil in South Africa, suggesting egg-laying mammal ancestors lived 200 million years ago.
Scientists have discovered an embryo fossil in South Africa, believed to be the oldest evidence that mammal ancestors laid eggs.
This finding, dating back approximately 200 million years, suggests that early mammal-like reptiles were oviparous.
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Los científicos encontraron un fósil de embrión en Sudáfrica, lo que sugiere que los antepasados de mamíferos que ponen huevos vivieron hace 200 millones de años.