Talking with Hands

Tsiolkovsky has a famous saying: The earth is the cradle of mankind, but mankind will not live in the cradle forever... However, although the future is bright, the road is not only tortuous, but also more than one or two. As for the way to go, a hundred schools of thought contend... ------------------ Verne-style science fiction, There are worlds, battles, mathematics, physics, chemistry, and biology... The world will not be destroyed, the world will be changed, the gold-fingered lightsaber will destroy ghosts and gods...