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TIL in 1912, an Irish physicist invented the optophone which was a device that was intended to allow blind people to hear "light". It was adapted to translate written words to sounds.

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4XkA6 Flying sick was a bad choice. Your congested ears refuse to pop and now you're stuck on a cross-country flight, cruising at 30,000 feet of ear-splitting agony. Here's how to fix it.
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