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By Alister Bull and David Alexander WASHINGTON (Reuters) - President Barack Obama on Tuesday urged world oil producers to lift crude output as he sought to deflect public anger over high gasoline prices that is hurting his popularity among voters.

You can't download an app these days without it asking for your location--and not just on check-in services like Foursquare and Gowalla. Google Maps, Instagram, Twitter , Square, MenuPages, Shazam--they all want to know exactly where you are whenever you're using the app. Heck, services like Google Latitude won't even let you decline to share your location--it'll just put you through an endless cycle of notifications, almost demanding you to accept its terms.

Antibiotics have proved to be a valuable weapon in the fight against infection, but their popularity has also become their undoing. Although the drugs cripple harmful microbes from within, bacteria that survive such sabotage tend to develop resistance that makes them even more dangerous

Social gaming firm Zynga has blossomed into a billion-dollar company thanks to the popularity of games like CityVille, FarmVille, and Café World.

From brain tacos to duck embryos, these freaky favorites are served proudly around the world.