Seven of the world's 10 countries with the most upbeat attitudes are in Latin America, says a new Gallop survey. Panama is No. 1 on the list. People in 148 nations were asked: Were they well-rested, had they been treated with respect, smiled or laughed a lot, learned or did something interesting and felt feelings of enjoyment the previous day.
A deal with El Salvador's two biggest street gangs may signal a less militaristic security strategy, writes guest blogger Geoffrey Ramsey.
NASA's twin sun-watching STEREO spacecrafts have tracked a comet as it looped around the sun before impact.