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A New Contender For Oldest Known Mammal 7

linxx points to this Discover article, writing: "A 195 million year old mammal the size of a paper clip is thought to run around the earth along with the dinosaurs." Not everyone is convinced yet that this is a true mammal, either -- but like other aspects of science, it's an ongoing attempt to find a line of best fit.
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A New Contender For Oldest Known Mammal

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I'm always looking for a new idea that will be more productive than its cost. -- David Rockefeller