Where did all that salt come from if freshwater rivers are always emptying into the oceans? Clean rainwater is slightly acidic, enough to dissolve some minerals from the rocks and soil it touches.

That high-profile patent dispute over rival improvements to salt water taffy pullers ... that if you connected the puller to the rocks at the ocean, across the street, it would pull the store ...

A little over 5 million years ago, water from the Atlantic Ocean found a way through the present-day Strait of Gibraltar.