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Paleontology

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“Smiling” Holy Island Pebble Likely a 350-Million-Year-Old Crinoid Stem, Experts Say

The British Geological Survey traced the tooth-like pattern to a section of crinoid stem built from connected ossicles.

Mosasaurs Lived in Rivers Near the End of the Cretaceous, Isotope Study Finds

Mosasaur Tooth Shows Bus-Sized Marine Reptiles Hunted in Cretaceous Rivers

Scientists Name Salwasiren qatarensis From Qatar’s Densest Sea Cow Fossil Bed

115-Million-Year-Old Australian Shark Fossils Push Back Onset of Giant Body Size in Modern Sharks

New Study Recasts Dunkleosteus as Cartilage-Heavy, Shark-Like Oddball

Decapitated Jurassic Fish Heads With Guts Intact Reveal Diet and Predators

Science Study of Arctic Bonebed Reveals Rapid Post-Extinction Rise of Marine Tetrapod Ecosystems

Scientists Name Shark-Like Oligocene Whale Janjucetus dullardi

Scientists Name New Long-Necked Plesiosaur From Germany’s Jurassic Fossil Beds

Mammoth Cave Yields Fifth New Shark Species: Macadens olsoni

Greenland Fossils Show Cambrian ‘Squid’ Were Ancestors of Arrow Worms

Grinding Tomography Reveals 40 New Squid Species in 100-Million-Year-Old Rock

Megalodon Was a Flexible Supercarnivore, New Study Shows