Science & Industry
What Did People Use for IDs Before Photos?
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Science & IndustryArticle28What Did People Use for IDs Before Photos?
In a world without cameras, biometric databases, or even consistent spelling, identifying individuals could be quite a complex challenge. Before photography helped fix identity to an image, societies developed a…
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Science & IndustryArticle717 Innovations That Came Out of World War II
Here are some of the most pivotal, successful, and enduring inventions to come out of the war.
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Science & IndustryFact17Listerine was originally a surgical antiseptic.
When chemist Joseph Lawrence developed Listerine in 1879, he didn’t have bad breath in mind. Inspired by surgeon Joseph Lister, who pioneered antiseptic medicine, Lawrence formulated and sold the product…
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Science & IndustryFact32Toothpaste used to be radioactive.
As with many world-changing discoveries, people initially went a bit overboard with radioactivity. The atomic process that causes radiation was discovered by Henri Becquerel in 1896 and studied further by…





