Black strings are the bizarre, five-dimensional cousins of black holes

Black strings are the bizarre, five-dimensional cousins of black holes: "We only experience four dimensions - three spatial plus time - but certain cutting edge theories suggest there are many more dimensions that we simply can't perceive. Depending on which theory you buy into, there could be anything from 10 or 11 to 26 total dimensions, with all but the familiar four microscopic and thus hidden from our view. (There are also some theories that suggest there could be a second time dimension, but those are truly bizarre.)"