Firewalls have turned this corner of physics into a cosmic Wild West: a strange frontier where black holes can take on the form of exotic stars, fuzzballs, time machines or iced wormholes (see «The firewall paradox»). (newscientist.com)
These giant, rather exotic stars are hypothesized to have existed for just a brief time in the early universe. (sciencedaily.com)
Modern astronomy paints a vivid picture of the universe having been born in a cataclysmic bang and filled with exotic stars ranging from gargantuan red supergiants that span the size of a modest solar system to hyperdense white dwarf stars and black holes that are smaller than Earth. (scientificamerican.com)