published on: 2013-11-26 09:41:56
laharenthu.tumblr.com/post/68151238569/
science-junkie: The Physics of Extraterrestrial Civilizations
laharenthu.tumblr.com/post/68252955406/
laharenthu.tumblr.com/post/68253109759/
laharenthu.tumblr.com/post/68253270095/
laharenthu.tumblr.com/post/68254009387/