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More than a billion years ago, in a shallow basin across what is now northern Ontario, a subtropical lake much like modern-day Death Valley evaporated under the sun's gentle heat, leaving behind ...

As rock salt — or “halite”, as mineralogists call it — crystallises out of saline waters, it can entrap tiny amounts of the parent waters as a so-called fluid inclusion. And if the originating waters ...

Evaporite deposits, usually halite ‘rock salt’ (NaCl), represent the desiccated remains of ancient seas or saline lakes. Accounts stretching back over almost a century suggest that microorganisms may ...