ABOUT THE SPACETIME PORTAL AND THE OTHER THINGS: Wormholes, crystal ball (future-telling) time machines, time rewinding, fast-forwarding, time-tunnels, the end of days, perpetual motion machines
Astronomy: Astronomy for Beginners: The Magical Science of Stars, Galaxies, Planets, Black Holes, Wormholes and much, much more! (Astronomy, Astronomy Textbook, Astronomy for Beginners)
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