“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...
When water vapour from the air condenses on a cold glass surface, such as one's eye glasses, you'll end up with droplets of water. These droplets are commonly known as fog. And with fog, comes...
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