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 Superluminal Speed (Faster than Light) Laniakea: Our home supercluster Gorgeous New Milky Way Image Maps Our Galaxy’s Dust How Many Stars Are There? Did the Moon Create Life on Earth? The U.S. Military Officially Preparing a False-flag Alien Invasion