Did you know that synthetic dyes, saccharin, Popsicles, Penicillin, Teflon, Velcro, super glue, Slinky, microwave oven, implantable pacemaker, were not a direct goals to be invented? While some sophisticated or even ordinary people were trying to create or discover something else, sometimes completely irrelevant, they came to materials with special properties! And finally those discoveries led to such helpful inventions. Watch the video to find out how they did those!