KABOOM! A NASA illustration of a gamma-ray burst. They occur, the space agency says, when "a massive star runs out of nuclear fuel, collapses under its own weight, and forms a black hole. The black hole then drives jets of particles that drill all the way through the collapsing star." NASA.gov hide caption

itoggle caption NASA.gov

Fire fighters and utility workers at the scene of a massive gas explosion and fire Tuesday night in Kansas City, Mo. Orlin Wagner/AP hide caption

itoggle caption Orlin Wagner/AP