Who Built This Mystery Circle On Mars? It looks like a circle, it’s most likely natural but it’s nice to dream. Facebook Prev Article Next Article Space Checkout these cool gadgets... Related Posts Neutron Star Merger Gravitational Waves and Gamma Rays Russian Rocket Tumbles Back To Earth NASA’s Next Generation Space Suit What Is This Sound Recorded Above Earth? The Physics of Space Battles This Asteroid Could’ve Caused an Apocalypse—Now It’s Barely Missing Earth