About a dozen species have been identified under this endangered genus, Dunkleosteus. These terrifying fish, with their powerful jaws, head, body, and heavy armor, roamed the oceans 358-382 million years ago. The biggest feature was the jawbones, which closed very...
The Moon has been moving away from the Earth for 4.5 billion years. This animated image from NASA shows how far the Moon has come from Earth. The Moon is moving away from the Earth at a rate of 3.78cm...
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