The Big Picture: NASA's 3.2-gigapixel global selfie

"Where are you on Earth Right Now?" That's the question NASA posed the public on Earth Day recently. The twist? NASA wanted you to answer, not with words, but with a selfie. 36,422 of you replied with images that were then stitched together to form the mosaic you see above. To fully enjoy the image, there's an interactive 3.2-gigapixel version that lets you get up close and personal with all the submissions (or, if you participated, try to find yourself).