Images: World's Oldest Petrified Sperm

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Modern Ostracod

Credit: Renate Matzke-Karasz
Scientists have discovered the world's oldest petrified sperm, dating to the early Miocene epoch, between about 23 million and 16 million years ago. The…Read More »

relatively giant sperm belonged to a tiny crustacean called a seed shrimp or ostracod. Here, a modern ostracod (Newnhamia). These tiny crustaceans create sperm longer than their own bodies. [Read the full story on the petrified sperm   Less «
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Stephanie Pappas

Stephanie interned as a science writer at Stanford University Medical School, and also interned at ScienceNow magazine and the Santa Cruz Sentinel. She has a bachelor's degree in psychology from the University of South Carolina and a graduate certificate in science writing from the University of California, Santa Cruz.
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