(source: http://www.theatlantic.com/technolo...)

This was voted as the "Best visual illusion of the year."
(source: http://www.scientificamerican.com/blog...)

via @jennjoysmith
(source: http://www.komonews.com/news...)

(source: http://www.washingtonpost.com/lifestyl...)

via @doctorow
(source: http://www.boingboing.net/2011...)

(source: http://www.whokilledbambi.co.uk/2011...)

(source: http://www.wired.com/wiredsci...)

Extreme-close-up view of volcanic ash particles from Iceland's Eyjafjallajökull. Now you see why planes were grounded; these things had nasty-sharp edges...
(source: http://www.wired.com/wiredsci...)

(source: http://gothamist.com/2011...)

Go see all the pics of the most beautiful subway stations in the world (really.) Via @SteveSilberman.
(source: http://corcholat.com/!zyi)