Ready-to-eat meals found in the prepared food aisle are a growing source of waste, as it is difficult to reuse meals that aren't sold but are fully cooked. Kristofor Husted/Harvest Public Media hide caption

itoggle caption Kristofor Husted/Harvest Public Media

The good old days: A flight attendant serves coffee and sandwiches to a passenger on board an American Airlines flight, circa 1935. Frederic Lewis/Archive Photos/Getty Images hide caption

itoggle caption Frederic Lewis/Archive Photos/Getty Images

Students are given healthy choices on a lunch line at Draper Middle School in Rotterdam, N.Y., in 2012. To keep students from tossing out the fruits and vegetables they're served, researchers say it helps to give them a choice in what they put on their trays. Hans Pennink/AP hide caption

itoggle caption Hans Pennink/AP

Sweet or salty? Historically among Eastern European Jews, how they liked their gefilte fish depended on where they lived. This divide created a strictly Jewish geography known as "the gefilte fish line." Claire Eggers/NPR hide caption

itoggle caption Claire Eggers/NPR

The French enjoy horse meat — here's a horse meat butcher in Paris. But even the French were angry that they had been paying beef prices for it last year. Thomas Coex/AFP/Getty Images hide caption

itoggle caption Thomas Coex/AFP/Getty Images

This grocery store packet of porcini mushrooms contained a surprise: three species of fungi never before named or described. Bryn Dentinger/Royal Botanical Gardens, Kew hide caption

itoggle caption Bryn Dentinger/Royal Botanical Gardens, Kew

In some parts of the U.S., Starbucks is testing a latte flavored with roasted-stout notes along with its seasonal autumn drinks such as the Pumpkin Spice Latte, seen here at front. Starbucks hide caption

itoggle caption Starbucks

Bounty from the bin: Thaler says you can find plenty of tasty, edible produce that's tossed out. Plastic-wrapped produce tends to be a safe bet, he says. Courtesy of Maximus Thaler hide caption

itoggle caption Courtesy of Maximus Thaler