Chemists solve major piece of cellular mystery

Not just anything is allowed to enter the nucleus, the heart of eukaryotic cells where, among other things, genetic information is stored. A double membrane, called the nuclear envelope, serves as a wall, protecting the contents ...

N-test legacy in stratosphere bigger than thought

Levels of radioactive plutonium in Earth's stratosphere from nuclear tests and accidents is higher than previously thought, but probably not dangerous to humans, scientists in Switzerland said Tuesday.

Probing the mysteries of cracks and stresses

Diving into a pool from a few feet up allows you to enter the water smoothly and painlessly, but jumping from a bridge can lead to a fatal impact. The water is the same in each case, so why is the effect of hitting its surface ...

Japan inches towards restarting nuclear reactors

Japan on Wednesday inched closer to re-starting idle nuclear reactors, just weeks after the last one was switched off amid public disquiet following the disaster at Fukushima.

GPS stations can detect clandestine nuclear tests

At the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) meeting this week, American researchers are unveiling a new tool for detecting illegal nuclear explosions: the Earth's global positioning system (GPS).

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