Hypothetical technology
technology that does not exist yet, but that could exist in the future
Stanford torus
life extension
McKendree cylinder
quantum memory
laser broom
malaria vaccine
momentum exchange tether
muon collider
water-fuelled car
photon rocket
Project Excalibur
Pure fusion weapon
quantum vacuum plasma thruster
Rocket sled launch
molecular assembler
space mirror
space travel under constant acceleration
star lifting
Sun scoop
simulated reality
Universal memory
Quantum telescope
self-replicating spacecraft
liquid breathing
gravity train