Which is quite a wide range . Water bubbling up in a mine in Ontario is between 1 billion and 2.6 billion years old . Comment: One brave scientist tasted horrible prehistoric water so the rest of us did n't have to .
Water bubbling up in a mine in Ontario is between 1 billion and 2.6 billion years old . Comment: One brave scientist tasted horrible prehistoric water so the rest of us did n't have to .