* Making Mars a one-way trip?
* Hearts and minds: fighting the war inside the Beltway.
* Hey, remember back in 2008, when McCain was praising Ireland's low taxes on businesses, and using it as an example of what we should do over here? Funny story.
* A memorial becomes a rallying point for gay veterans.
* The new media game: what next for the Tea Party?
* Checking in on four psychology fads.
* Whoah. Checking out the sunset on another planet.
* "The World Comes to Mecca: Images from the largest annual pilgrimage on earth."
* Daniel Radcliffe sings the elements.