This video sponsored by Tab for a Cause: www.tabforacause.org?r=3  Please support MinuteEarth on Patreon: goo.gl/ZVgLQZ And subscribe! goo.gl/EpIDGd Earth didn't have water when it formed, but it does now! How did it get wet? Created by Henry Reich Animation: Ever Salazar Production and Writing Team: Alex Reich, Peter Reich, Emily Elert Music: Nathaniel Schroeder: www.soundcloud.com/drschroeder Want to add captions to MinuteEarth videos? - minuteearth.subtitl.us MinuteEarth is available as a free iTunes podcast! - goo.gl/sfwS6n Facebook - facebook.com/minuteearth Twitter - twitter.com/MinuteEarth MinuteEarth provides an energetic and entertaining view of trends in earth's environment -- in just a few minutes! References Campbell, I. H., & O'Neill, H. S. C. (2012). Evidence against a chondritic Earth.Nature, 483(7391), 553-558. Drake, M. J. (2005). Origin of water in the terrestrial planets. Meteoritics & Planetary Science, 40(4), 519-527. Greenwood, J. P., Itoh, S., Sakamoto, N., Warren, P., Taylor, L., & Yurimoto, H. (2011). Hydrogen isotope ratios in lunar rocks indicate delivery of cometary water to the Moon. Nature Geoscience, 4(2), 79-82. Hauri, E. H. (2013). Planetary science: Traces of ancient lunar water. Nature Geoscience, 6(3), 159-160. Marty, B. (2012). The origins and concentrations of water, carbon, nitrogen and noble gases on Earth. Earth and Planetary Science Letters, 313, 56-66. Pepin, R. O. (2006). Atmospheres on the terrestrial planets: Clues to origin and evolution. Earth and Planetary Science Letters, 252(1), 1-14. Robert, F. (2001). The origin of water on Earth. Science, 293(5532), 1056-1058. Robert, F. (2011). Planetary science: A distinct source for lunar water?. Nature Geoscience, 4(2), 74-75. Saal, A. E., Hauri, E. H., Van Orman, J. A., & Rutherford, M. J. (2013). Hydrogen Isotopes in Lunar Volcanic Glasses and Melt Inclusions Reveal a Carbonaceous Chondrite Heritage. Science, 340(6138), 1317-1320.

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