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Scientists have discovered water that has been trapped in rock for more than a billion years. The water might contain microbes that evolved independently from the surface world, and it's a finding that gives new hope to the search for life on other planets.

The water samples came from holes drilled by gold miners near the small town of Timmins, Ontario, about 350 miles north of Toronto. Deep in the Canadian bedrock, miners drill holes and collect samples. Sometimes they hit pay dirt; sometimes they hit water, which seeps out from tiny crevices in the rock.

On a sunny spring day in eastern Afghanistan's Paktia province, Afghan officials and U.S. troops and civilians gather inside the ancient mud fort in the center of Forward Operating Base Gardez. They're attending a ceremony marking the formal end of the work of the provincial reconstruction team, or PRT.

The next time you see a father out shopping with his kids, you might need to check your assumptions.

"I'll get the, 'Oh, look, it's a dad! That's so sweet!' "says Jonathan Heisey-Grove, a stay-at-home father of two young boys in Alexandria, Va., who is pretty sure the other person assumes he's just giving Mom a break for the day. In fact, he's part of a growing number of fathers who are minding the kids full time while their wives support the family and who say societal expectations are not keeping up with their reality.