We kick off this week's podcast from a new report on the state of the world's oceans from the AAAS conference in Boston. Then, on to the Balkans for a report on couchsurfing.com. From there, we hop to London for a look at a website that allows people to exchange the fresh fruits and vegetables that they grow. And we'll end in Los Angeles, which recently played host to the world's first speedcabling championship. Fear not, all will be explained.

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