Paleontologists found this bundle of "giant sperm" in the reproductive tract of an ostracod that's been preserved for 100 million years in amber from Myanmar. From the Ludwig-Maximilians-Universit"at M"unchen: In fact, this is the oldest fossil in which sperm cells have been conclusively identified. Moreover, the specimen represents a previously unknown species of crustacean, which&

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https://boingboing.net/2020/09/18/scientists-find-100-million-year-old-sperm-preserved-in-amber.html