Scientists Think Mars Once Had Water. So What Happened to It? Mars may have had a core similar to Earth’s. It’s possible that when it diminished, the planet’s water went with it. Facebook Prev Article Next Article Space Checkout these cool gadgets... Related Posts How NASA Will Capture An Asteroid Could Ice Volcanoes Harbor Alien Life? World’s Largest Telescope Operational After 30 Years, $1B Engineers Get Inspired by Origamis for Solar Array Deployment WTF Is This Flying Object on Mars? Where Are The Voyager Probes?