Sean Carroll did it in 420 characters: http://twitter.com/#!/seanmcarroll/status/68741225250963456 http://twitter.com/#!/seanmcarroll/status/68741225250963456

Sean Carroll did it in 420 characters: http://twitter.com/#!/seanmcarroll/status/68741225250963456 http://twitter.com/#!/seanmcarroll/status/68741225250963456 http://twitter.com/#!/seanmcarroll/status/68741443379920896 http://twitter.com/#!/seanmcarroll/status/68741443379920896 http://twitter.com/#!/seanmcarroll/status/68741774100799488 http://twitter.com/#!/seanmcarroll/status/68741774100799488 (Background: http://blogs.discovermagazine.com/cosmicvariance/2011/05/13/3tweets/ http://blogs.discovermagazine.com/cosmicvariance/2011/05/13/...)