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Governments and the nuclear power industry have a strong interest in playing down the harmful effects of radiation from atomic weapons and nuclear power plants.

Both China and the United States have a common interest in protecting national infrastructure from third-party attacks, but neither appears willing to give up cyber espionage.

In post-Fukushima Japan, the authors review the recent shift in the nation's Japan’s nanotechnology policy and regulation, analyzing policy documents and government guidelines as well as interviews with prominent scientists and government officials.

Reviewing decades of sanctions on Iran, the authors write that a diplomatic resolution should be the approach to resolving the standoff with Iran over its nuclear program. 

The authors calculate that some 125,000 nuclear warheads have been built since 1945, about 97 percent of them by the United States and the Soviet Union and Russia.

In this interview, outspoken climatologist James E. Hansen reflects on his 30-plus years of studying climate change and warning the public about its dangers. He talks about the most recent developments in climate science and the questions still to be answered.

Recent research has revealed new facts about the British nuclear arsenal over a 25-year period starting in 1953. This accounting and the authors’ own research support an estimate that the British produced about 1,250 nuclear warheads between 1953 and 2013.

Russia is in the middle of modernizing its nuclear forces, replacing Soviet-era ballistic missiles with fewer improved missiles. In a decade, almost all Soviet-era weapons will be gone, leaving a smaller but still effective force that will be more mobile than what it replaced.