Change of pace this time. These two from Wired magazine should get your grey matter jazzed to think a little deeper:

“American Stonehenge: Monumental Instructions for the Post-Apocalypse” by Randall Sullivan (20 April 2009)

“Mission Impossible: The Code Even the CIA Can’t Crack” by Steven Levy (20 April 2009)

Btw, the May issue features guest editor Mr. JJ Abrams.