Man-Made Surfaces Can Achieve Near-Atomic Evenness.
Advanced polishing and deposition techniques allow for surfaces so smooth that irregularities are measured in angstroms, essential for technologies like computer chips and optical lenses.
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The First Item Sold on eBay Was a Broken Laser Pointer
In 1995, Pierre Omidyar created 'AuctionWeb' (later renamed eBay) and listed a broken laser pointer as a test. It sold for $14.83. When he contacted the buyer to confirm they understood it was broken, the buyer replied: 'I'm a collector of broken laser pointers.' Omidyar called it the moment he realized there was an online market for everything.
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The First Alarm Clock Could Only Ring at 4 AM
In 1787, clockmaker Levi Hutchins of Concord, New Hampshire, built the first known personal alarm clock. However, it could only ring at 4:00 AM — the time he needed to wake up for work. He never patented or commercialized the invention. The first adjustable alarm clock was patented in 1847 by Antoine Redier in France.
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Tim Berners-Lee Invented the World Wide Web and Gave It Away for Free
In 1989, British engineer Tim Berners-Lee proposed a hypertext information system at CERN to help scientists share data. The first website went live in 1991. Rather than patent the technology and become a billionaire, he and CERN released it into the public domain in 1993. Experts estimate his invention would have been worth trillions.
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Sound Travels 4 Times Faster in Water Than in Air
Sound travels at approximately 343 m/s in air at 20°C, but reaches about 1,484 m/s in seawater — over 4 times faster. Water's greater density and incompressibility allow molecules to transfer vibrations more efficiently. This is why humpback whales can communicate over thousands of kilometers through the ocean.