The patient had traveled to the Democratic Republic of Congo, the health ministry said. Workers are racing to trace those who may have had contact.

A generic version of a breakthrough cystic fibrosis drug, manufactured in Bangladesh for a fraction of the American price, may give some families around the world an unlikely lifeline.

Many philanthropists are backing away from climate giving. But one is writing very big checks.

The database of federal global warming research recreates a website that was closed amid the administration’s broad retreat from climate science.

Records are being broken for the second time in a month, leading scientists to probe the upper limits of what the warming climate can dish out.

That is good news for patients, but officials fear it will make controlling the spread of the disease harder.

The federal government wants to help utilities buy large components for up to 10 large nuclear reactors. It’s unclear which, if any, companies might participate.

Searing temperatures in Western Europe are drawing comparisons to 2003, when a deadly heat wave sparked a reckoning.

A team of historians, scientists and engineers has developed a portable X-ray scanner to study 4,000-year-old letters encased in clay envelopes.

It has stopped criminal prosecutions of people who install “defeat devices,” which make diesel trucks faster and more efficient but also dirtier.

A pilot program is building solar panels over irrigation canals to generate electricity. As a bonus, the shade prevents water from evaporating.