Photos: Analyzing an Amazing, Amphibious Dinosaur
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About 75 million years ago, an odd dinosaur walked from land into the water, where it used its flipper-like arms to swim in the ocean.Photos: Analyzing an Amazing, Amphibious Dinosaur
About 75 million years ago, an odd dinosaur walked from land into the water, where it used its flipper-like arms to swim in the ocean. Read more