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Flying saucers have been made. This is an example of an invention that very few people are aware of. Recently a saucer was made by the UK drone company Aesir. It wasn`t the first drone to be made. Before the Aesir, a drone was made called the Mollers prototype.
Also, if you look at the second picture, a real life flying car has been made called the The Highway in the Sky, and heres how it works: Every time youre stuck in traffic, you can flip a switch and swoop into the sky. Well, not literally, but flying cars may be made in the future but I doubt it because of the safety precautions and the pollution they can bring to the world.
I hope you found this post interesting!