3 ms·
Another one: what keeps the train on the tracks?
by imranq 12y ago
Another one: what keeps the train on the tracks?
- symmetricsaurus 12y agoFeynman explains it well [1]. [1]: https://www.youtube.com/watch?v=y7h4OtFDnYE https://www.youtube.com/watch?v=y7h4OtFDnYE