Hypothetical technology
technology that does not exist yet, but that could exist in the future
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