Algal blooms have hit the site, between the Lincoln Memorial and the Washington Monument, after a $14.2 million repair project.

With support from Markwayne Mullin and Robert F. Kennedy Jr., the kratom industry is pursuing a potentially lucrative policy. Mr. Mullin owns equity in a company that could benefit.

A new study of bilingual speakers suggests that a single “grammatical engine” in the brain can power multiple languages at once.

The health secretary is trying to restart the work of a panel that advises the government on vaccines, after a judge froze its decisions and prevented it from meeting.

A prolonged drought means the nation’s largest reservoirs are dwindling, and litigation over access to water could lie ahead.

John Sorochan, a turf scientist at the University of Tennessee, has led the yearslong, multimillion-dollar effort to develop perfect playing fields for the 2026 World Cup.

The agency gave a rosy update on Artemis III, a test flight for its goal to return humans to the moon, but experts say the timeline is ambitious.

The agency gave a rosy update on Artemis III, a test flight for its goal to return humans to the moon, but experts say the timeline is ambitious.

Every match must be played on natural grass that gives players as consistent a surface as possible, no matter the venue. Cue the years of sod studies.

NASA has chosen four astronauts for the Artemis III mission, but there has been a major setback: the destruction of a Blue Origin rocket and its only launchpad. Our science reporter Katrina Miller describes what this event might mean for the U.S. goal of landing on the moon by 2028.

NASA’s missions these days rarely feature all-male crews. Jared Isaacman, its administrator, said women play prominent roles throughout the space agency.

Elon Musk said he had initially given SpaceX less than a 10 percent chance of succeeding. His rocket company has come a long way.

Remains of the man, Joseph Louis Serrao Jr., discovered in a remote area in Olympic National Park in 2000, were identified using forensic genealogy.

Trials are beginning on several drugs that have shown promise in preliminary studies against the virus that is causing the current outbreak.

An eminent fossil hunter takes the reins at the National Academy of Sciences in a turbulent moment for American researchers.

A San Francisco company paid nearly $1 million for the solution to an unsolved code in Kryptos, a sculpture on the C.I.A. grounds. Soon it will become an online challenge.

More than 100 planned wind farms in 21 states are now stalled indefinitely as the Pentagon delays military reviews once seen as routine.

Amy McGovern was the director of an A.I. institute dedicated to weather forecasting — until the National Science Foundation ended its funding.

He built interfaces that allowed engineers, scientists and everyday people to solve difficult problems without having to write the underlying code.

In 1995, he and Thomas Bopp spotted, from different states, the same mysterious object in the sky. What turned out to be a comet was named after them: Hale-Bopp.