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David Attenborough celebrates his 100th birthday

David Attenborough once directed programming at the BBC and has hosted numerous award-winning nature documentaries, but he's always stayed down-to-earth, colleagues say

Is Pluto a planet? That’s asking the wrong question

The problem with Pluto isn't its planetary or nonplanetary status—it's our insistence on declaring the world must be one or the other

Scientists make AI play Battleship to help it do science better

AI models and people played "collaborative" Battleship to test strategies for efficiently solving problems

The science behind social media’s peptide obsession

As peptide "stacking" takes over social media feeds, we separate the science from the hype of the Internet's latest wellness obsession

There is no vaccine for deadly hantavirus, but this scientist is working on one

Virologist Jay Hooper is developing a vaccine for the rare rodent virus behind an outbreak on a cruise ship

US neutrino megaproject takes shape in abandoned gold mine

The Deep Underground Neutrino Experiment will study nature's most mysterious particle a mile beneath South Dakota's Black Hills, and potentially reveal the origins of matter

Pentagon releases trove of new UFO files, but skeptics aren’t impressed

The Pentagon's first UFO file release includes photographs, videos and documents gathered as part of an effort that spans several governmental offices and agencies, including the FBI, the White House and NASA

See the Pentagon’s new UFO image release

The Pentagon has started releasing files related to unidentified anomalous phenomena (UAP), also called UFOs. Here are the images released so far

Wildfire breaks out inside Chernobyl exclusion zone

A fire covering at least five square miles burned through the exclusion zone around the site of the world's worst nuclear disaster on Friday after two drones crashed into the area

Your Kids Asked the Artemis Astronauts Questions. They Answered.

RACHEL ABRAMS

The crew of NASA’s Artemis II mission discussed what the journey was like and what they ate for dessert in space.

What Is Body Dysmorphic Disorder?

CHRISTINA CARON

It may look like vanity, but it’s a debilitating mental health condition.

U.F.O. Files Released by U.S. Shed Light on What the Government Knows

MICHAEL LEVENSON

The Pentagon on Friday released online what it called “new, never-before-seen” files, dating back decades, related to unidentified flying objects.

She Tried to Help Schools Build Healthier Playgrounds. Then Her E.P.A. Grant Was Canceled.

EMILY ANTHES

Kirsten Beyer was assessing the benefits of improving school playgrounds in Milwaukee. Then her E.P.A. grant was canceled.

Hantavirus Is Nothing Like Coronavirus, but It’s Bringing Some ‘Covid P.T.S.D.’

NEIL VIGDOR

Experts have been quick to reassure the public after the deaths aboard the Dutch cruise ship MV Hondius, but images and turns of phrase have rekindled anxieties from Covid’s early days.

Trump Plans to Fire F.D.A. Commissioner Marty Makary

CHRISTINA JEWETT AND MAGGIE HABERMAN

Dr. Makary has been a supporter of the Make American Healthy Again Movement but made some enemies in the administration over vaping, the abortion pill and rejections of new drugs.