NASA celebrated Earth Day by harnessing the power of social media to create the mother of all selfie mosaics.
Their #GlobalSelfie campaign encouraged people to post selfies holding a sign with their location to social media sites with the hashtag attached. These were then stitched together to form the image above.
The final product is a whopping 3.2 gigapixels, featuring over 36,000 selfies from 131 countries.
The aim was to "create an image of Earth from the ground up while also fostering a collection of portraits of the people of Earth."
The preview above doesn't do it justice, so make sure you check out the full-size version here. Sure if you keep looking, you're bound to find someone you know. Might take a few hours though!