Salt is one of those dangerously tasty substances. We add the magical crystals of sodium chloride to almost everything that we cook or bake, and according to many public health experts, we add too much.
They want us to cut back, to lower our risk of heart attacks or strokes.
Yet when you really start looking for ways to do this, you run into a paradox and a scientific puzzle.
First, the paradox. Too much salt may kill us, but our bodies need some of it to survive.
Friday is the last day of a 5,125-year cycle in the Mayan calendar, sparking talk about the possible end of the world. About two years ago, a rumor began circulating on the Internet that the French village of Bugarach, population 200, would be the only place to survive this apocalypse.
But despite many news stories of people flocking to the village, less than two weeks before "doomsday," there was no one on the streets. Houses were shuttered against the cold.