image from boredpanda.com
featured image By NordNordWest – Own work using:NASA imagesUnited States National Imagery and Mapping Agency datawww.unimaps.com, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=3971789
Text © 2016 Bryan A. J. Parry
If you stare at it long enough, it starts to go backwards. A little after that, your eyes explode.