Greenland ice tipping point ‘further off than thought’
By Tim Hewison, posted on March 16th, 2009 in Climate, Water
Originally Published by guardian.co.uk/environment
Previous studies have misjudged the so-called Greenland tipping point at which the ice sheet is certain to melt completely, expert claims
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Tweetup at HQ
NASA astronaut TJ Creamer talks about his experience in space during a "Tweetup" at NASA Headquarters, Thursday, July 29, 2010, in Washington. Creamer, who spent 161 days living aboard the International Space Station as part of the Expedition 22/23 crew, set up the orbiting outpost's live Internet connection and posted updates about the mission to his Twitter account, sending the first live tweet from orbit. Image Credit: NASA/Paul E. Alers
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