NASA - NASA Mars Lander Sees Falling Snow, Soil Data Suggest Liquid Past

http://www.nasa.gov/mission_pages/phoenix/news/phoenix-20080929.html --- NASA's Phoenix Mars Lander has detected snow falling from Martian clouds. Spacecraft soil experiments also have provided evidence of past interaction between minerals and liquid water, processes that occur on Earth. A laser instrument designed to gather knowledge of how the atmosphere and surface interact on Mars has detected snow from clouds about 4 kilometers (2.5 miles) above the spacecraft's landing site. Data show the snow vaporizing before reaching the ground.

Dan Quayle was too smart for his time huh?

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