Km to cm Hitting the Books: The mad science behind digging really huge holes By - April 1, 2022 18 FacebookTwitterPinterestWhatsApp Sure you could replace the President with a self-aware roboclone, take the moon hostage, threaten to release a millennia-old Eldritch horror to wreak unspeakable terror upon the populace, or just ble⦠[+9570 chars]Source