How Thermite turned the clickety-clack of railroads into seamless, silent tracks. Get an exclusive 15% discount on Saily data plans! Use code veritasium at ...
  • ladicius@lemmy.world
    2·
    7 days ago

    Tldw: The rails are fixed to their support beams and therefore expand up and to the sides but not in length.

    More elaborate explanation starts at 24:30. I recommend watching the whole video!