Science NASA surprised to spot ice on Mercury

NASA's Messenger probe enabled researchers to find unexpected materials frozen in Mercury's north pole. Scientists think the materials arrived via comets or asteroids that hit millions of years ago. 

By , Reuters

AP Photo/NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

Despite searing daytime temperatures, Mercury, the planet closest to the sun, has ice and frozen organic materials inside permanently shadowed craters in its north pole, NASA scientists said on Thursday.