Trilobites Had Gigantic Orgies: Billions of Beasts Fossilized in Act of 'Naked' Sex
Trilobites Had Gigantic Orgies: Billions of Beasts Fossilized in Act of 'Naked' Sex

Photo: James St. John / Wikimedia Commons / CC BY 2.0   Orgies of sometimes billions of trilobites have been discovered, ones captured in a ...

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