Tribes and scientists are mounting an urgent trapping effort to keep European green crabs from devastating a corner of Puget Sound.

The technology is far from the only existential risk our species faces. But weighing such cosmic fears can become a mind-bending exercise.

A controversy around OpenAI’s latest math proof raises a fear that might become increasingly common: that A.I. tools could take valuable insights from one user and hand them to another.

Low rainfall and shrinking rivers are causing shipping bottlenecks, and higher prices, around the world.

Tristan Buckmaster was on the path toward an important proof when one of the A.I. giants used its staggering resources to get there first.

The screens of foldable phones are a triumph of materials science and microengineering.

Five years after virtually every world leader agreed to “phase down” the burning of coal for climate reasons, the fuel is more widely used than ever.

Sweltering summer temperatures put last month on par with July 2023 for global warmth, scientists said. More records could be broken in the months ahead.

Two lawsuits seek to reverse the Trump administration’s moves to open the habitats of imperiled wildlife to commercial activities.

A hunter-gatherer who lived in Indonesia as early as 25,000 years ago may have regularly sucked on betel nuts to release their psychoactive properties.

The Pentagon has again postponed PFAS cleanups at hundreds of military sites, in some cases up to 19 years, prompting bipartisan anger in Congress.