Life in the ancient Arctic: tiny teeth of newly discovered species suggest it was a cradle of mammalian evolution
Artist's impression of the Prince Creek Formation in northern Alaska during the Late Cretaceous period, with small mammal highlighted. James Havens, CC BY-NC-SA A fossil mammal tooth smaller than a grain of rice does not announce itself loudly. It must be hard won from sediment and stone. Then, under a microscope, it reveals itself – […]
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