Features

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  Jumping Genes in the Brain Ensure That Even Identical Twins Are Different

  How can identical twins grow up with different personalities? "Jumping genes" move around in neurons and alter the way they work

  Fred H. Gage and Alysson R. Muotri   | March 1, 2012  | 10

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  Internet Freedom Fighters Build a Shadow Web

  Governments and corporations have more control over the Internet than ever. Now digital activists want to build an alternative network that can never be blocked, filtered or shut down

  Julian Dibbell   | March 1, 2012  | 10

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  When 14 Billion Years Just Isn't Enough Time

  Some say its glory days are long gone, but the universe has life in it yet. Brand-new types of celestial phenomena will unfold over the coming billions and trillions of years

  Donald Goldsmith   | March 1, 2012  | 27

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  "Hockey Stick" Scientist Cross-Checks Critics: A Q&A with Michael E. Mann

  Michael E. Mann set out looking for a big scientific problem and wound up at the center of a political storm over climate change. Now he tells his side of the story

  David Biello   | March 1, 2012  | 115

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  Massive Energy Storage Technologies Could Revitalize the Power Grid

  If renewable energy is going to take off, we need good ways of storing it for the times when the sun isn't shining and the wind isn't blowing

  Davide Castelvecchi   | March 1, 2012  | 31

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  Dinosaurs of the Lost Continent

  The American West once harbored multiple communities of dinosaurs simultaneously—a revelation that has scientists scrambling to understand how the land could have supported so many behemoths

  Scott D. Sampson   | March 1, 2012  | 10

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  Search for Faster, Better Antidepressants Makes Progress

  Existing antidepressants leave a lot to be desired. They can take weeks to start working, and they fail many people. Researchers are scouting for better options

  Robin Marantz Henig   | March 1, 2012  | 8

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  Blocking HIV's Attack

  Scientists have rid one man of HIV by preventing the virus from entering certain immune cells. But the treatment was dangerous and likely unrepeatable. Can they figure out a safer, more broadly achievable way to help millions more?

  Carl June and Bruce Levine   | March 1, 2012  | 2