For Earth Day 2014, NASA released this interactive "Global Selfie" using selfies sent by 36,422 people from across the world.
Scroll with your mouse to see individual selfies.
Over 50,000 people from every continent submitted their #GlobalSelfie through social media.
Many sent selfies with their pets.
NASA then used 36,422 of the images to create this 3.2-gigapixel composite of how the earth appeared from space on Earth Day.
Here's a video of the Global Selfie in the making.