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Martian Gullies Explained By ... Sand

eldavojohn writes "There's a lot of evidence that a very long time ago some fluid once flowed on Mars, but the primary evidence of water today — gullies inside craters — is explainable by a much less exotic reason: flowing dust and sand. It would now seem that the news from 2006 that NASA had found definitive evidence of flowing water on today's Mars needs to be comprehensively reexamined. The Bad Astronomer lays claim that flowing sand and dust doesn't explain all recent hi-res imagery from the red planet, but it certainly does seem more plausible, considering what we know about Mars."

2 of 97 comments (clear)

  1. Just get better info by SnarfQuest · · Score: 5, Funny

    Take those photos that the various missions have taken of Mars, and use the photo analysis software that CSI uses. You should be able to look at things down to a molecular level then. Even a photo taken with a disposable camera that happened to be pointing in the direction of Mars during a stormy night should be sufficient to determint the location of all water on Mars. They could look at the back side of Mars based on a reflection from one of the stars behind it, so you should easily have 360 degrees of visibility..

    --
    Who would win this election: Andrew Weiner vs Andrew Weiner's weiner.
  2. What we know about Mars by Yvan256 · · Score: 5, Funny

    Nutrition Facts: Mars Bar

    Calories: 220
    Sodium: 70 mg
    Total Fat: 9 g
    Potassium: 0 mg
    Saturated: 6 g
    Total Carbs: 36 g
    Polyunsaturated: 0 g
    Dietary Fiber: 1 g
    Monounsaturated: 0 g
    Sugars: 30 g
    Trans: 0 g
    Protein: 2 g
    Cholesterol: 5 mg
    Vitamin A: 0%
    Calcium: 6%
    Vitamin C: 0%
    Iron: 4%

    Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.