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Silicon Valley has emerged early as a presidential campaign issue among Democrats at SXSW. Calls to regulate tech put the party in an awkward position, given its reliance on tech donors.

Let's imagine that we've ended global warming. Humans no longer are releasing greenhouse gases into the atmosphere. Here's what life is like in a zero-carbon world.

Getting DNA into plant cells is tricky. Researchers have tried using infectious bacteria, as well as gene guns that shoot gold bullets. Then a physicist came up with a new approach almost by accident.

Maybe it's just because a large number of older people have learned the benefits of exercise and canine companionship. Whatever the reason, walking a dog on a leash has been linked to more fractures.

Berlin's buzzing food scene, its fine cultural offerings and its real estate boom all have the imprint of the city's burgeoning Israeli community.