An American and a Danish aid worker kidnapped in Somalia three months ago have been freed in a rare US military raid.
Scientists are establishing a worldwide network of deep-sea listening posts connected to the Internet. It allows researchers — and the public — to hear whales, ships, and other underwater sounds. But the US Navy is uneasy because these sounds might reveal the location of its submarines.
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Hundreds of thousands of Haitians are attempting to leave the capital, Port au Prince, devastated by last week’s earthquake. Aid officials have started to put up tent cities on the outskirts for up to 400,000 people, to try to halt the spread of disease. The aid effort in Haiti has been frustratingly slow by some accounts. The World’s Matthew Bell looks into how aid agencies might do better. Download MP3 (Photo:Olivier Laban Mattei/AFP/Getty Images)