LIFE IN A COLD BROWN DWARF "Failed stars" could host remarkable forms of alien life. In the hunt for a celestial body that could host life (specifically, life like that found on Earth), scientists have typically looked for planets with surfaces similar to our own — about the same temperature, same chemical makeup, and, ideally, with liquid water like that from which we evolved. Now, a whole new group of space objects has joined the list of potential life-supporting hosts, and they don't have a planet-like surface at all. Researchers from the University of Edinburgh in the United Kingdom have proposed that we look for life in the upper atmospheres of cold brown dwarfs. These "failed stars" have the same elements found in traditional stars, but they lack the mass to ignite. Somewhere between the size of a planet and a star, they can boast atmospheres that hover around temperatures that would be considered comfortable on Earth and with about the same pressure levels. "You don't