Is cold the new hot?

Note: This article was originally published on astroibrahim on April 17, 2013. Yes. A few days back, a friend shared an article with me. It talked of how scientists had managed to achieve temperatures below absolute zero. Does it mean that temperature has to be redefined? Has our understanding of thermodynamics been flawed for the past hundred years. No, it turns out. It is all a matter of semantics. Absolute Zero.