Poppa was a nanobot apocalyptic prophet; He made himself unpopular with other engineers. In their published papers the critics liked to scoff at That wacky academic and his groundless, foolish fears. Grey goo, grey goo, grey goo, grey goo Finds carbon forms a scrumptious stew; Grey goo, grey goo, grey goo, grey goo Grey goo is coming to digest you! Soon those nifty nanobots were out in the environment Devouring deadly viruses until they disappeared. A life without disease became our natural entitlement; No microscopic pathogen would ever more be feared! Grey goo, grey goo, grey goo, grey goo Finds carbon forms a scrumptious stew; Grey goo, grey goo, grey goo, grey goo Grey goo is coming to digest you! But then those nasty nanobots decided replication Was something they should strive for as an object in itself. They’d finished all the viruses; the new eradication Was any form of carbon life - not good for human health! Grey goo, grey goo, grey goo, grey goo Finds carbon forms a scrumptious stew; Grey goo, grey goo, grey goo, grey goo Grey goo is coming to digest you!