After millions of dollars and millions of miles (ok, maybe billions on both counts) the Mars explorers are on the surface and hard at work. So far, one has dug a hole and encountered a white substance. Since Whitney Houston is still on Earth, it was speculated that the stuff was ice and if it was, it would disappear from the hole over time. Sure enough, the ice was gone later on. It had sublimated or gone directly to a vapor state, sort of like the U.S. economy, overnight. I don’t know about... Sign in to see full entry.