Earliest Live Birth Recorded

Foxnews has a story about a fossil fish that has been discovered with an intact embryo and umbilical cord. The story, somewhat humorously, notes:

"When I first saw the embryo inside the mother fish, my jaw dropped," said researcher John Long, a paleontologist at Museum Victoria in Melbourne, Australia. "It dawned on me after studying the specimen that this was the earliest evidence of vertebrates having sex by copulation — not just spawning in water, but sex that was fun."

One more piece of the puzzle.

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