http://www.ufoandparanormalnews.com/Government-Stories/will-comet-siding-spring-deep-impact-mars/ While Earth awaits Comet ISON, the Red Planet awaits a comet called Siding Spring. There is the possibility that Siding Spring will graze or even hit Mars in a deep, catastrophic impact. Sun, 06 Oct 2013 21:15:10 UTC en