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By Ewen Callaway of Nature magazine Human embryonic stem cells that are potentially pure enough to be used in therapies have been deposited into the UK Stem Cell Bank, and will soon be available across Europe.

By James Mitchell Crow of Nature magazine Nano-sized flakes of graphene oxide can be spun into graphene fibres several metres long, researchers in China have shown. [More]

Natural climate variability is extremely unlikely to have contributed more than about one-quarter of the temperature rise observed in the past 60 years, reports a pair of Swiss climate modelers in a paper published online December 4. Most of the observed warming--at least 74 percent--is almost certainly due to human activity, they write in Nature Geoscience .

By Ed Yong of Nature magazine In the deep ocean off the coast of Costa Rica, scientists have found a species of crab that cultivates gardens of bacteria on its claws, then eats them. The yeti crab--so-called because of the hair-like bristles that cover its arms--is only the second of its family to be discovered. [More]

When real brains operate in the real world, it’s a two-way street.

By Heidi Ledford of Nature of magazine With sales of more than $100 billion since it was introduced in 1997, the cholesterol-lowering drug Lipitor (atorvastatin) is an unparalleled pharmaceutical superstar.

The micro-blogging site buys some help in the mobile security department. Twitter has acquired Whisper Systems, a tiny security start-up that makes software for Android smartphones and other mobile devices

Nearly one metric ton of hardware will land on Mars in about nine months' time, uncurl its limbs, and start rolling around in the name of science. Designing something like Curiosity isn't easy. Around August 6, 2012, a spacecraft will reach Mars' surface after a nine-month journey from Earth

By Jo Marchant of Nature magazine In a secluded stretch of desert about 300 kilometers south of Cairo, hundreds of bodies lie buried in the sand. [More]

By Jo Marchant of Nature magazine The beautifully preserved leather trappings of an ancient Egyptian chariot have been rediscovered in a storeroom of the Egyptian Museum in Cairo. [More]

By Natasha Gilbert of Nature magazine Our last line of defence against hospital 'superbugs' is faltering, with resistance to the antibiotics usually used to tackle intractable pneumonia and urinary tract infections on the rise and spreading across European countries. The European Centre for Disease Prevention and Control (ECDC) in Solna, Sweden, announced last week that 29 new cases of bacteria resistant to the broad-spectrum carbapenem antibiotics had been reported across a total of six European Union (EU) countries between early October 2010 and the end of March 2011. The figures coincide with the publication, on 17 November, of a European Commission strategy to tackle antibiotic resistance.

By Monya Baker of Nature magazine The first company to test a human embryonic stem-cell product in patients has become the first big player to bail out of the field. [More]

By Meredith Wadman of Nature magazine The largest and most high-profile chimpanzee research centre in the United States has acknowledged to Nature that 137 infant chimpanzees have been born to federally owned animals under its care since 2000, despite a government moratorium on such births. [More]

By Ivan Semeniuk of Nature magazine The most fractious and combative US Congress in recent memory is getting on with approving a 2012 budget--although perhaps only so that it can move more swiftly to the next battlefield. [More]

Andrew Yang founded Venture for America to tackle unemployment, one aspiring entrepreneur at a time. Andrew Yang wants to create jobs. Specifically, 100,000 U.S