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This 236-Million-Year-Old Fossil Just Rewrote the Story of Live Birth - Gizmodo

Scientists have long thought cynodonts, the ancestors of all modern mammals, laid eggs. For the first time, researchers have found evidence to the contrary.

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The vast majority of mammals alive todayincluding usgive birth to live young, but this reproductive mode isn’t unique to mammals nor universal among them. In fact, it evolved independently many times… [+4434 chars]

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