Plot[]
Nobita and Gian sighed, "I'm hungry," and Suneo said, "I'm going to have a feast with Melon!" Suneo went to the house of "Yenban-san" in the neighborhood. Suneo often feasted on snacks when he told UFO enthusiast Enban-san that he had seen a UFO.
Knowing that, Doraemon said, "Let's take a picture of a real UFO!" And took out the "evolutionary raygun". According to Doraemon, if you set the evolution speed dial to the maximum and expose it to light rays, the evolution of a billion years will proceed in 10 days, and the moss growing on Mars will become a Martian.
Doraemon and others send an evolutionary degenerate raygun to Mars with a dedicated rocket and check the state of Mars on a monitor. Then, the moss that had grown on the ground gradually evolved, and a mushroom-like creature was born, and in a blink of an eye, a modern city was created on Mars.
And when ten days have passed, Martians will come to Earth on a UFO ...! ??