Furry forerunners: Jurassic arboreal, burrowing mammals unearthed

February 12, 2015 8:13 PM

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WASHINGTON (Reuters) - It may not have been the most opportune time to be a furry little critter, what with all those hungry dinosaurs and flying reptiles hanging around. But early mammals still managed to make their mark during the Jurassic Period.

Scientists on Thursday described fossils unearthed in China of two shrew-sized creatures that represent the oldest-known tree-climbing and burrowing mammals and show that early mammals had claimed a variety of ecological niches.

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