Rice University graduate student Damanveer Grewal gathered evidence to test a long-standing theory that Earth's volatiles arrived from a collision with an embryonic planet that had a sulphur-rich core. Grewal examined how much carbon and nitrogen made it into the core in three scenarios: no sulphur, 10 per cent sulphur and 25 per cent sulphur.from Business News: Latest News on Business, Stock Markets, Financial News, India Business & World Business News http://bit.ly/2RKFRBT
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