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 Google unveils 3 decades Timelapse of the Earth You Heard of Black Holes, What about White Holes? Why Can’t We Build Powerful Telescopes to See Aliens On Distant Planets? The Strange Case of the Himiko Blob Is There Life on Enceladus? Can We Grow Plants on Mars?