If you cook meat too long, at too high a temperature, the chemical reaction that creates tasty flavor and aroma compounds keeps going, creating other compounds. Some of those compounds can be carcinogenic when we consume them in high-enough concentrations.
After their villages were overrun by ISIS last year, hundreds of Yazidis sought safety on Mount Sinjar, a place they consider miraculous. Many families, including this one, refuse to leave the mountain.
Israeli violinist Itzhak Perlman in 2009, playing his Stradivarius during a rehearsal with musicians from the Simón Bolívar National Youth Orchestra in Caracas, Venezuela.
Thomas Coex/AFP/Getty Images
French police patrol near the Eiffel Tower in Paris on Monday. France is the most-visited country in the world, but the number of tourists has dropped off since the Nov. 13 attacks that killed 130 people.