Highest Man-Made Temperature: 4 TRILLION Degrees

The Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory doesn't have anywhere near the name recognition of the Large Hadron Collider (LHC) at CERN. But for the time being, it can lay claim to its own impressive achievement: it's just been recognized by Guinness World Records for achieving the "Highest Manmade Temperature." Go, RHIC!

The honor comes courtesy of the STAR (Solenoidal Tracker at RHIC) collaboration, designed to study the formation and characteristics of the quark-gluon plasma (QGP), a state of matter believed to have existed for ten-millionths of a second after the universe's birth .... http://news.discovery.com

4 trillion degrees Celsius = 250,000 times hotter than the center of the sun