Using the Global Positioning System (GPS), every point on Earth can be given its own unique address—its latitude, longitude, and height. The U.S. Department of Defense developed GPS satellites as a ...
Watch the Smithsonian's beloved giant pandas — Bao Li and Qing Bao — inside their habitat at the National Zoo and Conservation Biology Institute in Washington, D.C. The Giant Panda Cam is live from 7 ...
Most reef-building corals contain photosynthetic cells called zooxanthellae that live in their tissues. The corals and zooxanthellae have a mutualistic relationship. This means there is a positive ...
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