The idea is thrown around enough that it has been named depthscrapers or earthscrapers. There are many articles on it, if you're curious: https://duckduckgo.com

The idea is thrown around enough that it has been named depthscrapers or earthscrapers. There are many articles on it, if you're curious: https://duckduckgo.com/?q=depthscrapers+OR+earthscrapers&ia=web https://duckduckgo.com/?q=depthscrapers+OR+earthscrapers&ia=...