One-billion-years-old water

Of course, technically all water is even older than that. But as opposed to most water on the planet, this water discovered in Canada has been isolated from the "outside world" for over a billion years, trapped in a pocket of rock just recently accessed via a mine... making it extremely rare. Scientists think that it may contain bacteria that grew without the need for oxygen at all!

It's only for this water that you can't apply the following joke:

Amazing, huh?

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