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BiologyPhotosynthesis I
Through photosynthesis, plants harvest energy from the sun to produce oxygen and sugar, the basic...
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ChemistryThe Periodic Table of Elements I
The modern periodic table is based on Dmitri Mendeleev’s 1896 observations that chemical elements can...
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BiologyExtinction
In this module, we’ll learn about how people have been uncovering evidence of extinct species...
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