https://www.barnesandnoble.com/blog/sci-fi-fantasy/the-25-greatest-science-fiction-tropes-ranked/
25. Cryosleep
24. Generation Ships
23. Psychics
22. Ancient Astronauts
21. Space Pirates
20. Uploaded Consciousness
19. Benevolent Aliens
18. Killer Aliens
17. Alien Artifacts
16. Nanotechnology
15. Wormholes
14. Parallel Worlds
13. Interspecies Romance
12. AI Uprisings
11. Clones
10. Body Modifications
9. Robots
8. Faster-Than-Light Travel
7. Big Dumb Objects
6. Mutants
5. Dystopian Governments
4. After the Apocalypse
3. First Contact
2. Time Travel
1. Sentient Spaceships