Comments by "RB 70" (@RB-bd5tz) on "What happened to Land Submarines?" video.

@Jedai_Games Hmm; I have to disagree. There were many people back then that knew this idea was a no-go, so to speak. Rock was just as hard and unyielding then as it is now; they understood thermodynamics well enough to know a vehicle like this could never have enough power to work, or enough strength to survive.
1