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Published in 2017
What are coral reefs? Coral can be found in tropical ocean waters around the world. But how much do you know about reefs and the tiny animals—polyps—that build them? Learn all about coral and why warming waters threaten the future of the reef ecosystem.
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2
Published in 2013
Earth has shaped human evolution and now humans are shaping Earth. We will see how geologic and climatic changes have shaped human development, even sparked human migration around the globe as ice sheets advanced and retreated. Humans have become a force of nature in themselves, but is it a mistake...
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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3
This database contains a collection of USGS videos and animations that provides a broad representation of USGS research available through visual media. With one exception, all the products in this database are considered public domain and may be viewed or reproduced free of charge. Contents are...
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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