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Fossil Footprints in Brazil Hint at a Cougar-Size Mammal That Walked Among
Don’t think of all Mesozoic mammals as meek and tiny-alongside the terrible lizards, some were giants in their own right
Quick read
A Smithsonian Magazine article reporting that 130-million-year-old fossil footprints from southern Brazil suggest a cougar-size mammal or close relative lived alongside dinosaurs. Readers interested in paleontology would visit to learn how these tracks and other finds are changing views of mammal size and diversity in the Mesozoic.
- Tracks are five-inch-wide, nearly twice previous local mammal tracks
- Analysis indicates a quadrupedal, short-legged, pawed animal
- Adds to evidence that some Mesozoic mammals grew larger than thought
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