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As the US talks up denuclearizing North Korea, a former defense department official takes a look at the status of America’s stockpile of nuclear weapons.

On Oct. 25 Chile will decide whether to replace its dictatorship-era constitution with a new one written wholly by the Chilean people. The vote shows how protests can change the course of a nation.

Schools are a key battleground in the Ukrainian resistance against Russia’s invasion.

Anthropic’s Claude is helping the US military choose targets to strike in Iran, but responsibility for the accuracy, strategy and ethics of the decisions rests with humans.

A drought in Syria that was exacerbated by climate change helped fuel the unrest that led to the country’s civil war.

The US government locked up nearly 126,000 Japanese Americans from 1942 to 1945, but never kept comprehensive records of all the people subjected to this unjustified incarceration.

Even though there are 8 billion people on Earth today, a catastrophe could send that number much lower within a few decades.

The Trump administration is rewriting the 80-year-old American social contract for science research.

Finding the stories of individual Jews who fought the Nazis publicly and at great peril helped a scholar see history differently: that Jews were not passive. Instead, they actively fought the Nazis.

One hundred years after the Scopes trial, the culture war over evolution and creationism remains intense.