NASA is inviting you – and the rest of the planet – to contribute to further research. This time, the agency asks volunteers to leave their homes on April 22nd, Earth Day, and take a selfie holding this beautiful sign:

The photo should be posted on social networks using the hashtag #GlobalSelfie, or directly into event page on Facebook or Flickr.
The photos will be used to create a mosaic image of the earth and will also appear in a video created by NASA itself. The release of the image and video is scheduled for May.
So if you want to participate, print your sheet and, on April 22, take a selfie anywhere you want, as long as it's on the street. It can be in front of your house, in a field, a mountain, a square or by the lake. You choose where to take the best picture. 😉
More information about NASA's #GlobalSelfie can be obtained from the agency's official website here: http://www.nasa.gov/content/goddard/globalselfie/#.UzyCOfldWWY