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Ancient Ecosystems

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New Triassic Croc-Line Reptile Grew From Four-Legged Juvenile to Bipedal Adult

Hundreds of fossils from a dense Late Triassic bonebed let researchers quantify limb growth that signals a shift in how the animal moved.

Ecuador Quarry Yields South America’s First Mesozoic Amber With Insects

Study Links Violent Jurassic Storms to Baby Pterosaur Deaths

Giant Caiman Tooth Marks Reveal Terror Bird’s Fatal Encounter in Miocene Colombia

New Armored Lizard Species Identified From 77-Million-Year-Old Utah Fossils

Triassic Reptiles Migrated 10,000 Miles Through Inhospitable Tropics