We are living in the future. We have robotic personal assistants, watches that replace credit cards, phones that recognize our faces, and self driving cars are just around the corner. But for all...
All fireworks rely on a combustion process that has three basic requirements: some sort of fuel to burn, a supply of oxygen, and a source of energy to initiate the reaction between the fuel and the...
The thick liquid used to be called "oil of vitriol," since it was originally made by the distillation of "green vitriol," or iron sulfate as we know it today. It was so corrosive and nasty that...
Astronauts inhale oxygen and exhale carbon dioxide, just like you and me. On Earth, where exhaled air warmed by our bodies naturally rises away from us, the possibility of inhaling too much carbon...
“Dog Rocks” are supposed to solve the problem of grass dying from dog pee. Urine contains a variety of nitrogen compounds, mostly metabolites of protein in food. These are effective fertilizers,...
Everything has a birthday. It’s the same day, about 13.77 billion years ago. Scientists claim that they are 99% certain that this is the age of our entire universe. But how could they possibly know...
Silver is more than just an object of beauty. It’s the stuff of memories. Prior to digital photography, all picture taking relied on compounds of silver. The reduction of silver ions to metallic...
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