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Scientists have found a way to monitor volcanic carbon dioxide levels — one of the first signs a volcano might be about to blow — that doesn't involve trekking up a mountain.

An artificial intelligence safety firm has found that OpenAI's o3 and o4-mini models sometimes refuse to shut down, and will sabotage computer scripts in order to keep working on tasks.

The site's architecture may indicate the Judaean princess was buried there.

Thousands of satellites with incredibly short lifetimes are being sent up into low Earth orbit. When they fall back down they're fireballs of pollution — and what doesn't burn up hits the ground.

A large sunspot has just reappeared on the sun's Earth-facing surface, almost two months after it first emerged. The unusually old dark patch remains stable and could be on course to become the longest-lived sunspot on record, experts claim.

Invisible radiation leaking out of private satellites, like SpaceX's Starlink spacecraft, is disrupting radio astronomers' ability to detect important signals from across the universe. If left unchecked, we could reach an "inflection point" beyond which we can no longer properly study the cosmos, researchers warn.

First theorized in 1938, heat's wave-like flow through superfluids, known as "second sound", has proven difficult to directly observe. Now, a new technique has finally done it, and could be used to study neutron stars and high-temperature superconductors.

A NASA-funded plan to build a large radio telescope on the moon's far side is nearing final approval and could become a reality by the 2030s, researchers say. The ambitious project will help safeguard astronomy from satellite "megaconstellations" — and help scientists unravel more of the radio spectrum.

The number of satellites orbiting Earth is rising fast, thanks to private companies such as SpaceX. But just how big will these "megaconstellations" become? And what problems might they cause?

Giant groundsels are rare plants that grow up to 30 feet (9 meters) tall. They are endemic to the slopes of Mount Kilimanjaro, a dormant volcano in Tanzania and Africa's tallest mountain.

A study of more than 100 genomes from people who lived in ancient China has unmasked a "ghost" in their midst.