Al Gore has given the slide show which became An Inconvenient Truth about 2000 times. Now he's got a new, shorter slide-show (28 mins) that he tries out for the first time here. Hat-tip: Huffington Post.
Longest known comet tail stretched for over a billion kilometres
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NASA's Cassini spacecraft crossed paths with the elongated tail of a comet
in 2002, picking up hydrogen ions from over a billion kilometres away
47 minutes ago
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