The attack by an aggressive “collective” of OpenAI agents shows the danger of artificial intelligence systems that organize themselves.

USAID funding has significantly contributed to the reduction in adult and child mortality across low-income and middle-income countries over the past two decades. Our estimates show that, unless the a...

The country’s longest war came to an end exactly five years ago. Today it offers lessons for policymakers seeking to avoid an endless war in Iran.

Decades ago, Arizona won funding for a massive Colorado River project by agreeing to be first in line for cuts at a time of deep drought. The Trump administration says that time has come.

The tech giant is investing in the natural-gas-burning power plant as part of a huge data center in Texas, even as it pledges to honor climate commitments.

A day after multiple U.S. officials confirmed that investigators are looking into whether Iran or hackers associated with the country were part of the cyberattack on dozens of water systems across the...

Water disputes can directly drive conflict, but more often, water scarcity acts as a catalyst — one that, combined with other pressures, raises the risk

Jessica M. Goldstein, an arts and culture reporter, inspects why movies today look different than they did 20 years ago.

A Washington Post investigation found that in one of the planet’s most arid regions, extreme rain and floods have become frequent and deadly.

YouTube video by PBS Terra

Though Americans might be clamoring for relief on groceries, housing and energy costs, economists say there’s a bigger downside to falling prices.