spacelab
July 12, 2013
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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
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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
