Chemistry
Chemistry is the science of matter and the changes it undergoes during chemical reactions. In this section, learn about everyday chemistry, from chlorine beach to helium, and even why chocolate turns gray.
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More than fodder for melt-in-your-hand YouTube videos, gallium is a key component in LED lights and the powerful microchips in your smartphone.
By Dave Roos
The list of superstar athletes accused of - and admitting to - taking performance-enhancing drugs is almost as impressive as the number of sports that they compete in. And we're not just talking about steroids.
By William Harris, Jennifer Walker-Journey & Austin Henderson
Developed in Israel, this foul-smelling liquid has been used on Palestinian and Israeli protesters - and it's showing up in the United States.
By Sarah Gleim
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It's a force of habit to shake spray canisters, but when it comes to canned air, that inclination could cause frostbite.
Award-winning poet and fiction writer Mary Soon Lee has found a charming way to combine science and poetry in a refreshing new take on the periodic table of elements.
By Carrie Tatro