Vetenskapens värld · SEASON 23
Episode 20
Episode 20 · 1997-11-29

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Episode overview
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60 minutes
Season 23 episodes
1. Episode 11997-01-11
2. Episode 21997-01-25
3. Episode 31997-02-08
4. Episode 41997-02-22
5. Episode 51997-03-08
6. Episode 61997-03-22
7. Episode 71997-04-12
8. Episode 81997-04-19
9. Episode 91997-05-03
10. Episode 101997-05-17
11. Episode 111997-05-31
12. Episode 121997-06-14
13. Episode 131997-06-28
14. Episode 141997-09-06
15. Episode 151997-09-13
16. Episode 161997-09-20
17. Episode 171997-09-27
18. Episode 181997-11-15
19. Episode 191997-11-22
20. Episode 201997-11-29
21. Episode 211997-12-06
22. Episode 221997-12-13
23. Episode 231997-12-20