1 Tymor
52 Pennod
The Mechanical Universe - Season 1 Episode 17
Why a swaying bridge collapses with a high wind, and why a wine glass shatters with a higher octave.
- Blwyddyn: 1985
- Gwlad:
- Genre: Documentary
- Stiwdio: PBS
- Allweddair:
- Cyfarwyddwr:
- Cast: