1.2 billion-year-old groundwater is some of the oldest on Earth

Groundwater that was recently discovered deep underground in a mine in South Africa is estimated to be 1.2 billion years old. Researchers suspect that the groundwater is some of the oldest on the planet, and its chemical interactions with the surrounding rock could offer new insights about energy production and storage in Earth’s crust.

In fact, Oliver Warr, a research associate in the department of Earth sciences at the University of Toronto in Canada and lead author of a new study about the groundwater discovery, described the location in a statement as a “Pandora’s box of helium-and- hydrogen-producing power.”

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