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Scientists and Research
Tracking Endangered Jaguars across the Border
This module offers an in-depth profile of wildlife biologist Sergio Avila and his work to...
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Earth Science
The Hydrologic Cycle
Powered by the sun, water constantly cycles through the Earth and its atmosphere. This module...
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Scientists and Research
Percy Lavon Julian
The module traces the life and career of organic chemist Percy Julian, who developed a...
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