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But before you accept defeat in the face of stubborn weeds or resign yourself to eternal sheet-wrestling matches with your bed, we've discovered 25 genius inventions that prove human innovation is ...
4. Post-it Notes. Who: Spencer Silver, American chemist When: 1980 How it was created: While working on discovering a strong adhesive, Silver created low-tack glue that stuck to objects but could ...
Cellophane is a thin, transparent sheet made of regenerated cellulose. Its low permeability to air , oils , greases , bacteria , and liquid water makes it useful for food packaging . Cellophane is highly permeable to water vapour , but may be coated with nitrocellulose lacquer to prevent this.
Celluloids are a class of materials produced by mixing nitrocellulose and camphor, often with added dyes and other agents.Once much more common for its use as photographic film before the advent of safer methods, celluloid's common present-day uses are for manufacturing table tennis balls, musical instruments, combs, office equipment, fountain pen bodies, and guitar picks.
[1] Claw of Archimedes, purportedly a sort of crane used to drop an attacking Roman ship partly down in to the water during the siege of Syracuse. [3] Polybolos, an ancient Greek repeating ballista. [4] A MythBusters episode built and tested a replica, concluding that it plausibly could have existed. However, the replica machine was prone to ...
Play-Doh was originally called Rainbow Modeling Compound and used to clean wallpaper. A NJ nursery school teacher found it was fun to use as a toy.
Consisting of eight episodes, it was telecast on the National Geographic Channel from June 1, 2015 to June 22, 2015. [1] Through re-enactments, each episode focuses on the lives of two individuals (or groups) competing with each other in the same field of expertise, illustrating how some of the greatest inventions were made possible by ...
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