Hypothetical technology

lunar space elevator transatlantic tunnel perpetual motion machine Santa Claus machine time machine perpetual motion tectonic weapon ethnic bioweapon intelligence amplification quantum money space elevator space fountain nuclear lightbulb wearable generator wetware computer space tug nano electrokinetic thruster starship tractor beam teleportation terraforming space gun artificial general intelligence mind uploading artificial womb cloaking device stellar engine Matrioshka brain universal flu vaccine launch loop utility fog electric sail artificial life Death ray magnetic sail wet workshop moving the Earth space dock solar thermal rocket skyhook vacuum airship O'Neill colony Tipler cylinder Nuclear salt-water rocket nanorobot nuclear shaped charge space tether Epstein–Barr vaccine flying syringe magnet motor