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Layers of wax in the marine mammals' ears can be read like tree rings, scientists say, recording a whale's age and also information about pollutants in the water the whale swam through.

Author Anya Von Bremzen's new memoir, Mastering The Art of Soviet Cooking, is a tragic-comic history of a family and a nation as seen through the kitchen window. Everything we ate in the Soviet Union was grown ... by the party state," she says. "So, with the food, inevitably, you ingested the ideology."

Farmers say they need to produce food as efficiently as possible in order to feed the world. It's high-tech agriculture's claim to the moral high ground in the debate over how best to grow food. But is it true?

Investigators say they're confident only one gunman was responsible for the deaths of 12 people and wounding of others. The man who authorities say carried out the attack, 34-year-old Aaron Alexis, is also dead after a gun battle with police.

At least eight people have died. About 19,000 homes have been damaged or destroyed. It's expected to cost about $500 million to rebuild damaged roads. Meanwhile, efforts continue to reach people stranded by washed-out highways.

Tens of thousands of sea creatures have been killed by this month's sticky spill in Honolulu Harbor. Matson Inc. says it will cover all the related costs and will not ship molasses any more unless it is confident such a spill won't happen again.

Many laid-off workers continue the insurance they got on the job by paying for it themselves through an expensive option known as COBRA. The health insurance exchanges that open in October are likely to be a cheaper source for health coverage.

The 12 victims of the Navy Yard shootings that brought panic and tragedy to a corner of Washington, D.C., on Monday morning are in many people's thoughts Tuesday, as their names and other information emerge. We'll collect what we know about the victims here.

One word: oversupply. Too many ships were built before the 2008 global economic crisis. This drove down shipping rates, forcing the industry to scale back. The effects are still being felt. This week, a Finnish shipbuilder said it would close a yard that employed 700 workers.

As people age, caps called telomeres on the ends of their chromosomes shrink. The observation has led some scientists to argue the shortening is not only a marker of aging but a fundamental driver of it.