31 inventions of the 20th Century that changed the course of history: 🇮🇹 The Radio 🇺🇸 The Airplane 🏴󠁧󠁢󠁳󠁣󠁴󠁿 The Television 🏴󠁧󠁢󠁥󠁮󠁧󠁿 The Computer 🇺🇸 Cell Phone 🇺🇸 Escalator 🇷🇺 Helicopter 🇺🇸 Robot 🇺🇸 Radio Telescope 🇬🇧 Radar 🇩🇪 Jet Engine 🇩🇪 Electron Microscope 🇺🇸 Atomic bomb 🇺🇸 Laser 🇺🇸 Space shuttle 🇯🇵 Compact Discs 🇺🇸 Polio Vaccine 🏴󠁧󠁢󠁳󠁣󠁴󠁿 Antibiotics 🇩🇪 Chemotherapy 🇸🇪 Pacemaker 🇺🇸 Safety Razor 🇬🇧 Vacuum Cleaner 🇫🇷 Neon Lights 🇺🇸 Zipper 🇺🇸 Toaster 🇺🇸 Microwave Oven 🇺🇸 Transistor 🇺🇸 Ballpoint Pen 🇨🇭 Cellophane 🇺🇸 Chocolate Chips 🇺🇸 Tea Bags