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Earth
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Photo pf Kennicott and Root Glaciers, Alaska. Taken by Z. Smith

Exploring Earth: Investigations provides more than 75 earth science investigations. Each presents photos and text (and...
The golden toad, last seen in Costa Rica's cloud forest in 1989, is believed to be extinct. The ecology of the cloud forest depends on the frequent formation of clouds and mist.

Earth and Space Science provides activities, animations, and lessons on the structure, processes, and history of...
  

National Science Foundation

National Science Foundation
   
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