British pharmacist John Walker was striving to create a new gun paste in November 1826. After concocting a mixture of antimony sulfide, potassium chlorate, and gum arabic and stirring it with a wooden stick until it combined, he moved to clean...
Having never finished grade school, self-taught engineer Percy LeBaron Spencer seemed an unlikely candidate to invent something that would revolutionize the way Americans lived. Still, that didn't stop him from accidentally discovering the...
Anyone who has undergone any kind of surgery has had an encounter with anesthesia. It is, after all, the phenomenon that has allowed such invasions of the body to be far less painful than they were in the past. However, despite how common...
Cats are known for many things, but one of their most well-known characteristics is the purr. If one has ever had a cat - or even just encountered one that belonged to someone else - then one is likely to have heard this sound, the cute rumble...
Sleeping is, of course, an act with which everyone is familiar, given its necessity to human functioning. However, despite being a universal experience, scientists have yet to fully figure out just why humans - or other mammals - need it. After...
One of the most common science classroom experiments involves a balloon, and most people are familiar with the feeling of running it across one’s hair and generating a static charge. It’s such a common feature most people don’t even think about...
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