We all know Earth is special, but we may not fully appreciate how good we have it on this planet. Unlike its planetary neighbors, Earth has remained habitable for billions of years thanks to a ...
Scientists have discovered that an ultra-reactive chemical in Earth's atmosphere lasts much longer than we previously believed. In fact, they believe that millions of tons of the chemical could linger ...
Dimitar Sasselov teaches astronomy at Harvard University. HOW THINGS COULD HAVE BEEN: The image from Mars (L) shows us four billion year-old sediments from an ancient lake on the rocky planet. In ...
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