Dan Charles

According to a new survey of America's beekeepers, almost a third of the country's honeybee colonies did not make it through the winter.

That's been the case, in fact, almost every year since the U.S. Department of Agriculture began this annual survey, six years ago.

Over the past six years, on average, 30 percent of all the honeybee colonies in the U.S. died off over the winter. The worst year was five years ago. Last year was the best: Just 22 percent of the colonies died.

At the Center for Tropical Agricultural Research and Education (CATIE) in Turrialba, Costa Rica, you can touch the history of coffee — and also, if the optimists have their way, part of its future.

Here, spread across 25 acres, are coffee trees that take you back to coffee's origins.

"The story starts in Africa, no? East Africa," says Eduardo Somarriba, a researcher at CATIE, as we walk through long rows of small coffee trees.

Coffee is more than a drink. For many of us — OK, for me — it's woven into the fabric of every day.

It also connects us to far corners of the globe.

For instance, every Friday, a truck pulls up to the warehouse of Counter Culture Coffee, a small roaster and coffee distributor in Durham, N.C., and unloads a bunch of heavy burlap sacks.

Take a look at this remarkable graph — is it the stock market? Home sales?

Nope. Click on the blue box in the lower right-hand corner and you'll see that the blue line tracks the number of chicken wings that Americans bought at grocery stores over the last year. See that mighty surge of wing-buying in early February? Apparently, you just cannot have a Super Bowl party without chicken wings — millions and millions of chicken wings.

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.

The Food and Drug Administration has confirmed that it received five reports in the past past three years suggesting that people died after drinking caffeinated energy drinks.

But the agency also cautions that these reports do not add up to proof that the beverages actually caused those deaths. These reports — called adverse event reports — are considered unconfirmed allegations, and the FDA doesn't usually release them.