This was published in 1986. Tunneling with nuclear machines on Earth had been under consideration for decades before [1]. It's not entirely clear why it was ab

This was published in 1986. Tunneling with nuclear machines on Earth had been under consideration for decades before [1]. It's not entirely clear why it was abandoned, but most likely something didn't work out in practice like it was supposed to do in theory. [1] https://nationalinterest.org/blog/buzz/americas-mad-scientists-wanted-use-nuclear-power-create-tunnels-shocking-way-40072 https://nationalinterest.org/blog/buzz/americas-mad-scientis...