Earth's Water was Present During Planetary Birth

Analysis of water samples from Earth’s deep mantle suggest that the planet’s water has been present since Earth’s formation, a finding that has implications for other rocky bodies in the solar system and planets beyond as well.

November 12, 2015
2:00 PM EST
NASA astronaut Karen Nyberg took this photograph of the sun approaching sunset from the International Space Station in August 2013. | NASA/Karen Nyberg