The oldest known ancestor of Tyrannosaurus rex has been discovered in southern Utah, throwing light on the evolutionary history of the famous predator, and providing crucial clues to the puzzling…
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Feathers Were ‘Peculiar’ to Special Set of Dinosaurs, New Fossil Study Finds
Some of the Ancient West’s most distinctive and downright weird dinosaur species — from the famous Tyrannosaurus rex to the odd therizinosaurs — turn out to be members of an…
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Prehistoric Global Warming Caused Dwarfism in American Mammals, Fossils Show
As temperatures climb, animals shrink. It may sound unlikely — and the mechanism behind it is not very well understood — but it’s a pattern that’s been observed many times…
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Ancient ‘Clawed Bat’ Reveals Clues to Flying Mammal’s Evolution
The rare and delicate but perfectly preserved bones of a primordial bat found in Wyoming are offering up new clues to the evolution of the flying mammals, and to at…
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‘Unusual’ Fossil Egg Reveals Evolutionary Link Between Dinosaurs and Birds
Millions of years after the reptilian animals we know as dinosaurs disappeared, some of their traits persisted in surprising ways among their descendants — birds — a new fossil shows….
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New Horn-Faced Dinosaurs, Triceratops’ Oldest Relatives, Found in Montana
A group of horned dinosaurs, whose fossilized remains were discovered in Montana’s Judith River Basin, are the oldest known members of the family that includes the famous Triceratops, a new…
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