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 5 REAL Possibilities for Interstellar Travel Scientists Observe Two Supermassive Black Holes Merging Titan and The Mystery of the Missing Waves The Strange Case of the Himiko Blob Researchers Are Pretty Sure They’ve Found A New Planet In Our Solar System Stephen Hawking Says He’s Figured Out How To Sescape From a Black Hole