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 Scientists Cannot Identify Object in Space – NASA Footage Old-looking galaxy in a young universe: Astronomers find dust in the early universe NASA Probe Captures First Color Images Of Pluto Scientists Discover Organisms from Space in Earth’s Atmosphere Does Earth Have A Second Moon? Do Events Inside Black Holes Happen?