Nuclear weapons production and testing contaminated many sites across the US and exposed people unknowingly to radiation and toxic materials. Some have gone uncompensated for decades.

Depleted uranium munitions are bad news for enemy tanks, but are not nuclear weapons, and studies have shown that they pose low risks of radiation or chemical exposure.

China’s newest hypersonic missile, the DF-27, could sideline US aircraft carrier groups in the Pacific, while missiles in the works in China, Russia and the US threaten global security.

Mass shooters pursuing fame often plan their attacks as "surprises," a study shows. This tendency makes them uniquely challenging to prevent.

Most firearm owners keep at least one firearm unlocked, and some view gun locks as an unnecessary obstacle in an emergency.

A year ago, the Ukrainian military was largely equipped with Soviet-era weapons. It has since seen an influx of high-tech weapons. But it’s less what than how that’s made a difference.

The technology exists to build autonomous weapons. How well they would work and whether they could be adequately controlled are unknown. The Ukraine war has only turned up the pressure.

Survey study of awareness in UK and US populations also shows that brief exposure to latest data on ‘nuclear winter’ deepens doubts over nuclear retaliation.

"This is this the oldest bone projectile point in the Americas and represents the oldest direct evidence of mastodon hunting in the Americas."