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Scientists are working to solve a mystery of Earth’s molten outer core, which lies more than 2,000 kilometers beneath our feet

Bundibugyo virus is an uncommon species of Ebola-causing virus that has been linked to only two other known outbreaks

Smart-panel start-up Span wants to turn spare household electricity into AI computing power. How far it can scale and what effect that would have on the residential grid remain unsettled

Our galaxy and its nearest large companion, Andromeda, may be headed for a collision on a cosmic scale. What happens then?

In an effort to reduce prices at the pump, an EPA wavier allows the sale of fuel with 15 percent ethanol content

How an experiment involving a made-up skin condition exposes the risks of increasingly popular AI medical advice

This launch, when it comes, will mark the 12th flight test of Starship and the first demonstration of its V3 design. A new attempt could come as soon as Friday

Constructed by ancient Egyptians, the Great Pyramid has survived multiple earthquakes through the ages—now researchers think they know why

These critters were carrying the Sin Nombre variant of hantavirus, which can be spread from rodents to humans but not from one person to another

An out-of-this-world weather report from NASA’s James Webb Space Telescope reveals how clouds move across a giant planet hundreds of light-years from Earth

Experts question this study’s design and its recommendations—and point out that you probably get more exercise than you think

Gold doesn’t tarnish like similar metals do. A new paper says that the key is the intricate “herringbone” pattern of its atoms.

This year’s expected El Niño could hamper hurricanes in the Atlantic but boost them in the central and eastern Pacific

While drugs such as Wegovy target a single gut hormone, retatrutide is among a new class of GLP-1 drugs that aims at three hormone receptors

A chatbot’s result for the 80-year-old “unit distance” conjecture is the first AI proof that would likely be published in math’s top journal if humans had done it alone

This eerily simple math says our days are numbered—and nobody can agree why it’s wrong

Friday’s flight could be the most pivotal test of the Starship megarocket

The wobbly, lanky arachnids known as harvestmen or daddy longlegs may be overlooked as predators of small vertebrates such as frogs, researchers say

The science of de-extinction does not exist, but Colossal Biosciences’ “artificial egg” is an interesting technical feat

The Trump administration warned that too much screen time for children has been linked to poor sleep, bad behavior, and less physical and social activity