Like the Bose–Einstein condensates, fermi condensates will coalesce (grow together into one entity) with the particles that make them up. Bose–Einstein condensates and fermi condensates are also both man-made states of matter. The particles that make these states of matter have to be artificially super-cooled, to have the properties that they do. However, fermi condensates have reached even lower temperatures than Bose–Einstein condensates. Also, both states of matter have no viscosity, which means that they can flow without stopping.