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    spacelab
    July 12, 2013

    —————
    Life on Mars: goo.gl/1GQby

    Ultra-High-Energy Cosmic Rays: goo.gl/TY73b

    Type 1a Supernovae: goo.gl/yNcjU

    Dark Matter: goo.gl/PBgR3

    The Fate of the Universe: goo.gl/kAmSy

    SUBSCRIBE, future astronauts: http://goo.gl/bRbj4
    LINKS for the TOP 5 are listed BELOW!!

    Watch more of The Countdown: http://goo.gl/JnNep
    Visit Scientific American’s website for more space news:http://goo.gl/qXeIq

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