Enlarge ImagePeer pressure. Magnetic domains in steel (vertical bans) arise when neighboring electrons point their magnetic poles in the same direction. Credit: Zureks, Chris Vardon/Wikimedia It would be tough to stick it to your refrigerator, but an ultra-cold gas magnetizes itself just as do metals such as iron or nickel, a team of atomic physicists reports. That cool trick shows that the messy physics within solids can be modeled with pristine gases, the researchers say. But others are skeptical that the team has actually seen what they claim. Condensed matter physicists can tell you essentially all there is to...