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BiologyThe Piltdown Hoax
The Piltdown Man was once hailed as the "missing link" in the evolution of apes...
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Earth ScienceHistory of Earth's Atmosphere II
The composition of Earth’s atmosphere has evolved over time. This module examines how Earth came...
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Math in ScienceWave Mathematics
Waves, circles, and triangles are closely related. In fact, this relatedness forms the basis of...
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