"The world’s oldest water, which is locked deep within the Earth’s crust, just got even older.

The liquid was discovered deep down in a mine in Canada in 2013 and is about 1.5 billion years old.

But now, at the same site, University of Toronto scientists have found a deeper source of water that is at least 500 million years more ancient.

The work was presented at the American Geophysical Union Fall Meeting in San Francisco."

Rebecca Morelle reports for BBC News December 14, 2016. [2]