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 Could We Stop An Asteroid with Laser Bees? Black Hole Comparison Is Jaw-dropping Introduction to UrtheCast – Earth’s Live HD Camera – Zooming on Your Nudist Beach New Study Suggests We’re Approaching The “Big Crunch” Is this a UFO crash site on Mars? Scientists figured out how to hide from aliens