10 sci-fi concepts that are possible (in theory)

Science fiction novels and movies are packed with far-out ideas, most often as the springboard for an action-packed adventure rather than a serious attempt to predict future trends in science or technology. Some of the most common tropes, such as accelerating a spacecraft to fantastic speeds in a matter of seconds without crushing the occupants , are just plain impossible according to the laws of physics as we understand them. Yet those very same laws appear to permit other seemingly far-fetched sci-fi concepts, from wormholes to parallel universes. Here's a rundown of some of the sci-fi ideas that could really be done — in theory, at least.

remus989,
  1. Tractor beams
  2. Wormholes
  3. Warp drive
  4. Time travel
  5. Teleportation
  6. Parallel universes
  7. Habitable Mars
  8. Easy fusion
  9. Rock-throwing warfare
  10. Artificial gravity
  11. Ultra-personalized health care
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