Paleontologists unearth a trove of early mammalianfossils
The plains of western Wyoming are today a scarred moonscape of gray hills, but 50 million years ago they were mostly swampland, lush with exotic life. Primitive lemurs swung through palm trees, while the first horse, Eohippus, a short-legged creature about the size of a fox terrier, nibbled on grass beside the squirrelish Paramys.
Now two scientists with the Carnegie Museum of Natural History in Pittsburgh have rooted beneath the sediment of the Wind River valley to unearth a spectacular cache of fossils from the Eocene epoch, that...
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