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By Heidi Ledford of Nature magazine Cells taken from the tips of mouse tails and genetically reprogrammed to mimic mature liver cells can repair damaged livers.

By Marian Turner of Nature magazine When a research team started analyzing the genetics of micro-organisms from their university pond, they might have expected to find a couple of new species. [More]

By James Mitchell Crow of Nature magazine Fossilized dinosaur tracks that dot a remote 80-kilometre stretch of Western Australia's coastline are under threat from a proposed natural gas facility, say paleontologists. The tracks were made by multiple species of sauropod, theropod and ornithopod dinosaurs as they walked across mud flats around 130 million years ago.

By Geoff Brumfiel of Nature magazine In the era of WikiLeaks and Twitter, can anyone keep a secret? Governments have learned that, all too often, the answer is no. [More]

By Eugenie Samuel Reich of Nature magazine An epic victory over daunting challenges, or a costly project that should never have flown? After nearly half a century of work and US$750 million spent, Gravity Probe B, one of NASA's longest-running mission programs, has finally achieved some scientific closure. [More]

By Matt Kaplan of Nature magazine Modern mammals often live in groups, but most marsupials are solitary. [More]

By Jon Cartwright of Nature magazine This week, computer chip manufacturer Intel announced that it is preparing to enter a new dimension in transistors--literally. [More]

By Jeff Tollefson of Nature magazine Given the current political climate, it did not come as much of a surprise when the chief executive of one of the largest utility companies in the United States addressed the tenth annual Conference on Carbon Capture and Sequestration (CCS) in Pittsburgh, Pennsylvania, this week with a talk questioning the viability of carbon-storage ventures in the next few years. Michael Morris, chief executive of American Electric Power (AEP), headquartered in Columbus, Ohio, said that the energy industry needs a signal from politicians in Washington DC.

Passion alone is typically what drives a founder to get a new business off the ground.

By Lucas Laursen of Nature magazine Nuclear accidents can have devastating consequences for the people and animals living in the vicinity of the damaged power plants, but they also give researchers a unique opportunity to study the effects of radiation on populations that would be impossible to recreate in the lab. Tim Mousseau, who directs the Chernobyl Research Initiative at the University of South Carolina in Columbia, together with an international team, is studying the long-term ecological and health consequences of the 1986 accident at the Chernobyl nuclear power plant in the Ukraine. [More]

WBy Nadia Drake of Nature magazine The sighting of a lone gray whale ( Eschrichtius robustus ) last year off the beaches of Israel, and then again near Spain, came as a surprise to many. [More]

By David Cyranoski of Nature magazine The International Space Station (ISS) is just one space-shuttle flight away from completion, but the construction boom in low-Earth orbit looks set to continue for at least another decade.

By David Cyranoski of Nature magazine The International Space Station (ISS) is just one space-shuttle flight away from completion, but the construction boom in low-Earth orbit looks set to continue for at least another decade. [More]

By David Cyranoski of Nature magazine Memories fade, events get conflated, names get attached to the wrong faces, or, in the case of post-traumatic stress disorder, signals in safe environments can mistakenly evoke emotions that rightly belong to a battlefield tragedy. [More]

In the past year floods have submerged cities as far apart as Nashville, Tenn., and Nowshera, Pakistan.