Tiny holes in three fossil clams reveal that by 75 million years ago, ancient octopuses were deviously drilling into their prey. The find pushes evidence of this behavior back 25 million years, scientists report February 22 in the Biological Journal of the Linnean Society.
The clams, Nymphalucina occidentalis, once lived in what is now South Dakota, where an inland sea divided western and eastern North America. While examining the shells, now at the American Museum of Natural History in New York, paleontologists Adiël Klompmaker of the University of Alabama in Tuscaloosa and AMNH’s Neil Landman spotted telltale oval-shaped holes. Each hole was between 0.5 and 1 millimeters in diameter,
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