do nanites exist
This means that, theorietically, a swarm of nanites could exponentially expand, consuming all life on Earth. Just in case you were wondering, nanites run on carbon, what all life is made out of. That means, to self-replicate, they must consume carbon. Nanites already exist, but they do not have the self-replication yet. It would be even worse if they were implanted with some kind of collective A.I. However, if the nanites do not kill all life on Earth, here are some positive things that can come out of this: Cures for almost all disease Incredibly cheap and efficient manufacturing.