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Thursday, March 22, 2018

Two-billion-year-old salt rock reveals rise of oxygen in ancient atmosphere

http://ift.tt/eA8V8J Salts left over from ancient seawater reveal new information about the oxygenation of the Earth's atmosphere more than 2 billion years ago.

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Children whose mothers use marijuana are more likely to try it at younger age

When mothers use marijuana during the first 12 years of their child's life, their cannabis-using children are more likely to start at an...