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Flickr/PortoBay Hotels & Resorts

Rio de Janeiro, in Fantastically High Definition

The Brazilian city like you've never seen it. Really.

Alertos.org

Crowdsourcing Crime Reporting in the World's Murder Capitals

On the problem-solving power of cell phones in Central America.

Reuters

Do the Winter Olympics Have a Future in a Warming World?

 Russia's balmy weather could be a sign of things to come, a new study says. We're running out of places cold enough to host the Games.

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