| human immunodeficiency virus infection vaccine(noun, expression, entity, concept, proposition) |
| hypothetical spacecraft(noun, expression, entity, concept, proposition) |
| inferential programming(noun, expression, entity, concept, proposition) |
| interstellar travel(noun, expression, entity, concept, proposition) |
| isotropic beacon(noun, expression, entity, concept, proposition) |
| launch loop(noun, expression, entity, concept, proposition) |
| malaria vaccine(noun, expression, entity, concept, proposition) |
| matrioshka brain(noun, expression, entity, concept, proposition) |
| mind control(noun, expression, entity, concept, proposition) |
| mind uploading(noun, expression, entity, concept, proposition) |
| nano electrokinetic thruster(noun, expression, entity, concept, proposition) |
| non-rocket spacelaunch(noun, expression, entity, concept, proposition) |
| orbital ring(noun, expression, entity, concept, proposition) |
| phased-array optics(noun, expression, entity, concept, proposition) |
| quantum vacuum thruster(noun, expression, entity, concept, proposition) |
| radio frequency resonant cavity thruster(noun, expression, entity, concept, proposition) |
| reactionless drive(noun, expression, entity, concept, proposition) |
| rocket sled launch(noun, expression, entity, concept, proposition) |
| room-temperature superconductor(noun, expression, entity, concept, proposition) |
| space fountain(noun, expression, entity, concept, proposition) |