- Original release
- Previous episode S2013E638 - Why do we see illusions? - Mark Changizi
- Number S2013E639
- Episode runtime 10 minutes
- Genres News, Documentary, Children, Animation
-
External links
TheTVDB page
IMDB page
-
Last update
3 octobre 2026 - 06:13
on 11 databases
Euclid's puzzling parallel postulate - Jeff Dekofsky
Next episode
S2013E640 - TED-Ed YouTube Channel Teaser
