The tried-and-true content remains the same, but the look and feel and underlying architecture have been thoroughly revamped

French chemist discovered the element lutetium

The unpredictable properties of both crystalline forms of Fischer's hydrazone

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Mineralogist considered one of the founders of modern geochemistry

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50 to 60 years ago, the global environmental movement began with Silent Spring, the Club of Rome, the first Earth Day

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What happened during this night in 1922?

American biochemist known for the co-discovery of vitamin A