New Cast21 Sleeves Are Waterproof and Itch Free

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New Cast21 Sleeves Are Waterproof and Itch Free

What's the worst part about a broken arm? The insatiably itchy cast. You go on a run with your dog one evening when he spots a squirrel, twists you over his leash, and sends you flying into weeks of scratching your fiberglass-encased arm with a no. 2 pencil.

Thomas Edison's Planned To Invent A Spirit Phone To Talk With The Dead

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Thomas Edison's Planned To Invent A Spirit Phone To Talk With The Dead

Thomas Edison is known for his many inventions, but not all of them totally worked out. Of his hundreds of patents, one little-known 1920s idea sticks out as slightly peculiar: Edison's spirit phone. The inventor had plans to create a device that would communicate with the dead. But we're not talking about any Ouija board-type mumbo-jumbo garbage. Edison wanted his device to not function by "any occult, mystifying, mysterious, or weird means employed by so–called 'mediums,' but by scientific methods." Gotta admire his intentions.

Automatic Doors Were Invented In Ancient Times

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Automatic Doors Were Invented In Ancient Times

Hero of Alexandria's automatic door design relied on pneumatics to work. First, a fire was lit on an altar near the door. The fire was connected to a hidden contraption below, which, under the influence of heat and pressure, would force water into counterweights that caused the doors to swing open. Once the fire died down, the water would exit the counterweights and the doors would close.

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from Alltime10s

Key Facts to Know

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    Ancient Egyptians introduced the process of nasal reconstruction, which was often performed on thieves whose noses had been cut off. 1:07

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    Hero of Alexandria designed an automatic door for temples in the first century AD. 3:35

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    In 212 BC, the Greek physicist Archimedes allegedly set ships aflame by using polished copper to reflect sunlight onto them. 6:09

This Is The Weird Reason Revolving Doors Were Invented

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This Is The Weird Reason Revolving Doors Were Invented

Theophilus Kannel, born in Pennsylvania in 1841, was the inventor of the revolving door. Though his past is mysterious, it is believed that Kannel invented the revolutionary door in order to avoid having to hold doors for women. A public spanking at the age of 12, presumably after not holding a door, motivated Kannel to create a solution. He patented his "storm-door structure" in 1888, which included weather stripping to prevent energy loss. This invention solved numerous problems that traditional doors could not answer. Another invention of Kannel's includes Witching Waves, which is a scooter ride at Coney Island.

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Key Facts to Know

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    Theophilus Kannel invented the revolving door to avoid having to hold doors for women. 0:06

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    Theophilus Kannel patented his revolving door design in 1888. 0:32

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    Revolving doors are more energy efficient than traditional doors, and keep outside odors and noise from entering a building. 0:55

Velcro Was Inspired By Dog Fur And Cockle-Burs

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Velcro Was Inspired By Dog Fur And Cockle-Burs

A Swiss engineer named Georges de Mestral went for a walk in the woods with his dog in 1941, and noticed burrs sticking to his trousers and dog. Inspired by the little stickers, Mestral spent eight years of research trying to synthetically recreate this bond. Finally, he was able to create one strip with thousands of little hooks and another strip with thousands of little loops to simulate the bond the burrs had with his clothing and pet in the woods. He named his invention Velcro (a combination of "velvet" and "crochet"), and patented it in 1955.

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Key Facts to Know

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    George de Mestral, born in 1907, invented Velcro. 0:07

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    Velcro was inspired by burrs that stuck to his trousers and dog after a walk in the park. 0:22

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    Velcro was named by combining the words "velvet" and "crochet." 0:48