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 Dynamic Earth – How Our Magnetosphere Protects Us 5 Most Mysterious Sounds Recorded in Space NASA Probe Captures First Color Images Of Pluto NASA’s Messenger Will Crash Into Mercury This Month Asteroid Mining Mission Revealed by Planetary Resources, Inc. The Strange Case of the Himiko Blob