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A Controversial U.S. Study of Hepatitis B Vaccines Will Continue in Africa, HHS says

This clinical trial in Guinea-Bissau would withhold vaccination from some babies, sparking ethical concerns

What Is Beige Fat, and Is It Healthy?

This mysterious type of fat cell may play an important role in heart health, new research shows

Incredible Cheetah Mummies Show Big Cats Once Roamed the Arabian Peninsula

The naturally mummified remains of dozens of cheetahs hidden deep in caves in Saudia Arabia shed light on where the animals lived in the past, which might inform rewilding efforts

Kratsios Calls Patchwork State AI Laws ‘Anti-Innovation’ at House Science AI Hearing

The Trump administration's top science adviser urged the adoption of a single national AI rule book as lawmakers pressed him on who would pay for the build-out

JWST’s ‘Little Red Dots’ May Be ‘Black Hole Stars’

Puzzling red spots in images from the James Webb Space Telescope are probably young supermassive black holes obscured by dense cocoons of gas

At 25, Wikipedia Now Faces Its Most Existential Threat—Generative A.I.

Wikipedia had to fight to establish its legitimacy—and now it faces a new existential threat posed by generative AI

In Venezuela, Big Oil Collides with a Hotter Planet

A break down of why Venezuela's oil boom is clashing with a hotter, more fragile planet

It’s so cold in Florida that iguanas might rain from the skies

Florida's iguanas are an introduced species, and they aren't used to the chilly temperatures the state is currently experiencing

Astronomers Spot Mysterious Bar-Shaped Cloud of Iron Inside an Iconic Nebula

A distinctive nebula inside the constellation Lyra holds a never-before-seen cloud of iron atoms—and researchers aren't sure why

Why Are There No Green Stars?

Stars emit lots of green light, but our eyes don't let us see them that way

RFK, Jr., shifts focus to questioning whether cell phones are safe. Here’s what the science says

The possible health effects of radiofrequency waves emitted by cell phones has been a subject of debate for decades

NASA’s historic Artemis II moon mission is almost ready to launch

On Friday NASA laid out the time line for Artemis II, humanity's first crewed mission to the moon in more than 50 years

This gene may determine if dogs have long, floppy ears or short, study ones

Scientists are just beginning to understand the signals that determine the length of dogs' ears

NASA’s Artemis II mission to the moon is inching toward the launch pad

NASA rolled out the fully stacked Artemis II rocket and Orion capsule on Saturday, embarking on a four-mile journey to the launch pad

World models could unlock the next revolution in artificial intelligence

Why today's AI systems struggle with consistency, and how emerging world models aim to give machines a steady grasp of space and time