Earth's Oceans Delivered by Comets?
Using the powerful Herschel Space Telescope, scientists have found evidence that the water in Earth's oceans could have been delivered by comets rather than asteroids.
What's the Latest Development?
During observations made with the powerful Herschel Space Telescope last year, astronomers found frozen water on a comet called Harltey 2. More recent analysis shows that the molecular composition of the comet's water—specifically, its deuterium-to-hydrogen ratio—matches that of Earth's. The Hartley 2 comet comes from the Kupiter belt, a band of space rocks much larger than our solar system's asteroid belt. Scientists will now look to other comets in the Kupiter belt to see if their composition is similar to Hartley 2.
What's the Big Idea?
Water has been found on six comets prior to Hartley 2 but never before has the chemical composition of the water matched that of Earth's oceans. What's more, "the handful of water-bearing comets previously discovered, the researchers believe, came from the Oort cloud, a band of comets about a light-year away from the sun." The Kupiter belt, which scientists believe Hartley 2 calls home, is 1,000 times closer to Earth and could explain the difference in chemical compositions.
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A guide to making difficult conversations possible—and peaceful—in an increasingly polarized nation.
- How can we reach out to people on the other side of the divide? Get to know the other person as a human being before you get to know them as a set of tribal political beliefs, says Sarah Ruger. Don't launch straight into the difficult topics—connect on a more basic level first.
- To bond, use icebreakers backed by neuroscience and psychology: Share a meal, watch some comedy, see awe-inspiring art, go on a tough hike together—sharing tribulation helps break down some of the mental barriers we have between us. Then, get down to talking, putting your humanity before your ideology.
- The Charles Koch Foundation is committed to understanding what drives intolerance and the best ways to cure it. The foundation supports interdisciplinary research to overcome intolerance, new models for peaceful interactions, and experiments that can heal fractured communities. For more information, visit charleskochfoundation.org/courageous-collaborations.
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