Melissa Block talks to Robert Moore of the University of West Georgia's physics department about a surprising display of the northern lights Monday night that went as far south as Mississippi, Arkansas and Georgia itself.

The last B53 bomb is supposed to be dismantled Tuesday. Michele Norris speaks with Hans Kristensen from the Federation of American Scientists about the historical climate surrounding the B53 bomb.

The Boston Globe collected fish samples from across the state and learned from scientists that 48 percent were mislabeled. In many cases, cheaper species were substituted for higher-end species in restaurants, seafood markets and grocery stores.

Some 73 million sharks are killed each year for their fins. Despite increased public awareness, large-scale operations are still open for business in many countries, new images show.

The oil tanker S.S. Montebello was sunk by a Japanese submarine during World War II off the coast of California. A recent expedition to the wreck found that oil believed to still be in the ship is not there. It's full of seawater. It's the Al Capone's vault of the sea, if you will.

In a single 24-hour period, the National Park Service and National Geographic led a "treasure hunt" to catalog all the species in Arizona's Saguaro National Park. NPR's Ted Robbins takes us to the "BioBlitz."

Archaeologists announced this week that they have found a 1,000-year-old Viking burial site in the Scottish Highlands of Ardnamurchan. Host Scott Simon takes note of the find, which has been called "one of the most important Norse graves ever excavated in Britain."

Gelatins turn liquids into solids, and can make cream-based dishes into a lighter, more flavorful affair by eliminating the need for heavy, flavor-distorting fats, says Spanish-born restaurateur and top chef Jose Andres.