From billiard balls to plum pudding to “probability clouds”—our understanding of the atom has changed a great deal over the course of history, and will likely continue to evolve along with the technology we use to study it. Here’s a quick recap of the past 2,500 years of atomic theory.
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The pocket-sized card melts in hot water and re-hardens in just a few minutes.May 25, 2016
The silicone-based polymer mimics the properties of healthy, youthful skin.May 11, 2016