Scientists have found a fossil dating back at least 16 million years of a female shrimp-like creature with enormous fossilized sperm in her reproductive tract. It's a unique example of a female that copulated just before she died and started to turn to stone.
The fossil is a display of "ancient sex with gargantuan sperm," says the lead scientist, Renate Matzke-Karasz of German's Ludwig-Maximilian-University, via e-mail. "We have here direct evidence of a recent mating. … All the co-authors are still amazed by the findings."