I remember the first time I saw a Santiago Calatrava bridge, a spinal column of calcium-white ribs snaking across a Spanish ravine. “That’s cool,” I thought. Then, a few years and a few thousand miles ...
July 31 (UPI) --New X-ray images of ancient fish fossils have helped scientists solve a 160-year-old mastery about the origins of the vertebrate skeleton. Heterostracans are a group of fossil fishes ...
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