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Searched for: ~atmosphere ~calm ~clear ~clouds ~fluffy ~formation ~nature ~outdoor ~peaceful ~sky ~weather
Results 856 - 860 of 4,138
Authored by Nick Strobel, this chapter covers the characteristics of other normal galaxies, active galaxies, and finding distances to other galaxies, including the distance-scale ladder. It also includes large-scale...
The US Antarctic Research Center maintains the Nation's most comprehensive collection of Antarctic maps, charts, atlases, satellite images, photographs, slides, video produced by the United States and other member...
The National Institute of Health provides this Web site as a clearinghouse of resources for biomedical research using model organisms. The site currently contains Web pages for two mammalian models, six non-mammalian...
This teacher's guide with exercises is intended to help teach the topics of radioactive decay and its use to determine age. It identifies four main concepts that students are likely to struggle with: spontaneity...
This National Park Service, part of the Department of Interior website, looks at issues concerning water quality, policies and objectives, water quality standards, monitoring and the NPS's cooperation with other...
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