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BiologyMass Extinctions
The most recent mass extinction was about 65 million years ago, well before humans began...
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Scientists and ResearchLuis E. Miramontes
His name may not be familiar, but Mexican chemist Luis Miramontes was instrumental in a...
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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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