11. Slinky
Mechanical engineer Richard James invented the Slinky by accident. He was trying to make a tough spring which could keep sensitive ship equipment steady at sea. He kept all of his samples on a shelf. One day accidentally e dropped one of the samples and that began to walk on the ground all on its own.
12. Velcro
Swiss electrical engineer George de Mestral invented this unique fastener. He went hiking with his dogs in the woods. Upon arriving at his home back he observed that burrs stuck his coat and of his dogs. He further researched it and made a distinctive type of fastener named- Velcro.
13. Superglue
The glue was invented by scientist Harry Coover in 1942. He and a team of chemists were working on creating clear plastic. The team failed to achieve the goal but came out with a different product. It was first rejected but later became popular by the name of super glue.
14. Matchstick
John Walker, in 1805, was once cleaning up his laboratory with a wooden stick. He was shocked to observe the sparks that came out from the stick. He later researched the chemicals and invented the matchstick.
15. Coca-Cola
While serving as a lieutenant colonel, John Pemberton who was a pharmacist was wounded. He got addicted to morphine,. He later began to work to create a potion that was narcotics-free and would cure an upset stomach. But he ended up creating Coca-cola which became immensely popular among the public for its unique taste.
