TIL that early in the second world war, Churchill (anticipating trench warfare stalemates as in the first world war) commissioned the invention of a “mole” machine that could dig new trenches to take itself and a convoy of tanks deep into the enemy lines.
This link was originally posted to /r/todayilearned. See more things from Dan's Reddit account.
The original link was: https://en.wikipedia.org/wiki/Cultivator_No._6