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By Geoff Brumfiel of Nature magazine North Korea may have conducted two covert nuclear weapons tests in 2010, according to a fresh analysis of radioisotope data. The claim has drawn scepticism from some nuclear-weapons experts. [More]

By Geoff Brumfiel of Nature magazine North Korea may have conducted two covert nuclear weapons tests in 2010, according to a fresh analysis of radioisotope data. The claim has drawn scepticism from some nuclear-weapons experts.

By Geoff Brumfiel of Nature magazine Bill Murray is a man with secrets.

By Geoff Brumfiel of Nature magazine Galileo, the largest program ever launched by the European Space Agency (ESA) will enter its latest phase with the launch of two navigation satellites on 20 October. [More]

By Geoff Brumfiel of Nature magazine Today IBM unveiled a new "cognitive computing" microchip that, according to the company, emulates some of the brain's abilities. [More]

By Geoff Brumfiel of Nature magazine Scientists in California are reporting raised levels of radioactive chemicals in the atmosphere in the weeks following the disaster at Japan's Fukushima Daiichi nuclear power plant. [More]

By Geoff Brumfiel of Nature magazine GRENOBLE, FRANCE When its experiments started in earnest earlier this year, many scientists hoped that the world's most powerful collider would turn up new particles, additional dimensions and perhaps even a small black hole or two. [More]

By Geoff Brumfiel of Nature magazine Seventeen and a half billion kilometers from Earth, mankind's most distant probe seems to be on the edge of interstellar space. The Voyager 1 spacecraft is at the limit of the 'heliosheath', where particles streaming from the Sun clash with the gases of the galaxy. [More]

By Geoff Brumfiel of Nature magazine A team of physicists is claiming to have coaxed sparks from the vacuum of empty space. [More]

By Geoff Brumfiel of Nature magazine St-Paul-lez-Durance, France The world's largest fusion experiment is finally beginning to take shape. [More]

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 Geoff Brumfiel of Nature magazine From the name, one might expect the International Atomic Energy Agency (IAEA) to have been a major force in the response to the Fukushima nuclear crisis in Japan. [More]

By Geoff Brumfiel T The magnitude-9.0 earthquake rocked Fukushima Daiichi nuclear power station at 2:46 p.m. [More]