The hashtag #GlobalSelfie is overlaid on the "Blue Marble" image of Earth -- the first image from space that shows the entire planet. Africa, Antarctica, and the deep blue ocean are visible beneath swirling white clouds. Credit: NASAALT

For Earth Day, we’re inviting you to take a moment to celebrate our wonderful water world, Earth. As far as we know, our Blue Marble is the only place in the universe with life, and that life depends on water. Snap a photo of yourself outside and tag it #GlobalSelfie – bonus points if your selfie features your favorite body of water! http://go.nasa.gov/3xFt0H0

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