nov 262013
 
Did Greenhouse Gases Raise Ancient Martian Temperature?

  Much like the Grand Canyon, Nanedi Valles snakes across the Martian surface suggesting that liquid water once crossed the landscape, according to a team of researchers who believe that molecular hydrogen made it warm enough for water to flow. Split panel comparing (a) a section of Arizona’s Grand Canyon against (b) a section of [continue reading]

jul 112013
 
How the Early Earth Kept Warm Enough to Support Life

  Solving the “faint young Sun paradox” — explaining how the early Earth was warm and habitable for life beginning more than 3 billion years ago even though the Sun was 20 percent dimmer than today — may not be as difficult as believed, says a new University of Colorado Boulder study. An artist’s conception [continue reading]