TED-Ed

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http://tedchris.posterous.com/

Why Can't We See Evidence of Alien Life? http://youtu.be/I2apGYUX7Q0

How Many Universes are There? http://youtu.be/a1bWKZFP2Tc

Sótt frá „http://asta.is/index.php?title=TED-Ed&oldid=216“

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