Estimates the amount of water than billions of years old

Scientists first found in the earliest estimate of the quantity of water are managed.

This water is below ground level and the amount scientists say is far more than previously thought.

According to the water, some of which have existed for more than two billion years, all the rivers, streams and lakes over the water.

Scientific affairs correspondent for the BBC's Rebecca Morel researchers city in the US state of California, the American Geophysical Union meeting in San Francisco said.

Causing the formation of the continents on Earth in a layer of the planet's oldest rocks are found, but these rocks, scientists have researched several kilometers below the water.

University of Toronto and Oxford University study estimated that the combined amount of water is a million cubic kilometers.

This amount is more than all the water in the world is found in reservoirs.

Oxford University professor says Chris bylntayn important thing is that the ancient rocks of the underground water is being matched the hydrogen gas that is a dietary factor.