HUNTSVILLE, AL (WAFF) - Get your cell phones out... NASA kicked off a global selfie event for Earth Day.
Here's how it works: you snap a photo of yourself then post it on one of five social media websites, including twitter, using #GlobalSelfie.
NASA will then use those photos to create a mosaic image of earth.
You can also post your photos on Instagram, Facebook, Google+ and flickr.
To download the #GlobalSelfie sign, click here.