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Blue Origin’s Failure May Hamstring NASA’s Moon Plans

KENNETH CHANG

The space agency is counting on Jeff Bezos’ company to deliver equipment essential to the next moon landing, only two years away.

A Humanoid Robot Races to a Record Half-Marathon Finish

ADEEL HASSAN

The android won a race featuring robots and humans on Sunday in Beijing, achieving a technological milestone while finishing faster than any person in history.

Analysis of Alzheimer’s Drugs Stirs Debate About Their Effectiveness

PAM BELLUCK

The review said a certain class of drugs had little clinical benefit, but many Alzheimer’s experts criticized the analysis, saying it unfairly lumped failed drugs with two recently approved treatments.

What’s in a Name? For These Snails, Legal Protection

ZOË LESCAZE AND MARÍA JOSÉ ZAVALA BALCÁZAR

Scientists are debating the classification of threatened mollusks that an Indigenous community relies on for their way of life.

Why firstborns may be more likely than secondborns to be autistic or to have allergies

A comprehensive study found differences in numerous health conditions in firstborn children versus those born second

FBI investigating possible links between deaths and disappearances of at least 10 scientists

This announcement from the FBI came after President Donald Trump highlighted the recent deaths of several scientists and government workers who may have had access to sensitive information

Ex-NASA astronauts form new group to promote U.S. constitutional values

More than 100 NASA astronauts have signed on to a nonpartisan effort to promote "the principles that have propelled our nation for 250 years"

NASA just dropped a stunning new Hubble image of a ‘Cosmic Sea Lemon’ 5,000 light-years away

The Hubble Space Telescope turns 36 this year. And to celebrate, it released an incredible new image of the Trifid Nebula

The quantum arrow of time can be reversed, physicists show

Researchers have developed a way to flip time to move backward in a quantum system. This level of control could lead to bizarre real-world applications

Where Are All These Meteors Coming From?

ROBIN GEORGE ANDREWS

The frequency of fireballs in our planet’s skies seemed to grow in recent months. NASA and other meteor experts can’t agree on what explains it.

Mathematicians found out why waiting for the elevator takes forever

Does it ever feel like an elevator is always going in the wrong direction? Mathematics can explain why

E.P.A., Maryland Sue D.C. Utility Over Potomac River Sewage

SCOTT DANCE

In separate lawsuits, environmental regulators said D.C. Water failed to prevent and contain a massive spill of raw sewage upstream of Washington.

Hegseth says U.S. military no longer requires flu vaccination, drawing criticism from health experts

The decision to no longer enforce mandatory annual flu shots for military personnel could mean more troops will get sick during flu season, one expert says

Judge Halts Trump Actions That Have Slowed Renewable Energy

BRAD PLUMER

The Interior Department had imposed restrictions on wind and solar projects across the country, prompting developers to sue.

The Help That Many Older Americans Need Most

PAULA SPAN

With shortages of medical professionals and an aging population, thousands of community health care workers prevent older adults from falling through the cracks.