At age 11, actor Alan Alda asked his teacher what a flame was. He received a confusing answer: "oxidation." In the spirit of better communicating science, he's created the "Flame Challenge," a contest in which scientists do their best to define a flame. Eleven-year-olds from around the world will judge the entries.
Though the Chevy Volt and Nissan Leaf entered the market to fanfare, the battery-powered cars haven't been selling as quickly as hybrid models such as the Toyota Prius. Industry experts discuss electric car technology, from batteries to charging stations, and what it might take to encourage drivers to make the shift.
The complexity, scale and sliding timetable for implementation of the federal health overhaul make it tough to figure out exactly what's happened so far. To help you sort through some key provisions, here's a scorecard.
In effort to add pressure on Syrian President Bashar Assad, the European Union has announced new sanctions on a dozen Syrians, including Assad's wife, his mother, sister and sister-in-law.
"I cannot say to you in strong enough terms how much we are concerned about what's going on in Syria," said Catherine Ashton, the EU's foreign policy chief, according to CNN. "I'm really worried about the escalating spiral of violence there.