Science is Fun Fridays!
The world's oldest pool of water has been found deep within the Kidd Creek Mine of Ontario, Canada. Geologist/Professor Barbara Sherwood Lollar led a team into the rock, 1.8 miles below the surface. She even tasted the water, explaining that she was looking for a salty taste. Saltier tends to be older. She confirmed it is much saltier than seawater. Bitter too. The team found traces that indicated life had once been present. "By looking at the sulphate in water, we were able to see a fingerprint...the signal we are seeing in the fluids has to have been produced by microbiology - and most importantly has to have been produced over a very long time scale." Without light, the microbes survived using substrates produced from radiation. As long as the water and rock are in contact, the reaction that creates the sulfate will continue to occur naturally and persist potentially billions of years.