An artificial intelligence safety firm has found that OpenAI's o3 and o4-mini models sometimes refuse to shut down, and will ...

Thousands of satellites with incredibly short lifetimes are being sent up into low Earth orbit. When they fall back down they ...

A large sunspot has just reappeared on the sun's Earth-facing surface, almost two months after it first emerged. The ...

A NASA-funded plan to build a large radio telescope on the moon's far side is nearing final approval and could become a ...

The number of satellites orbiting Earth is rising fast, thanks to private companies such as SpaceX. But just how big will ...

Giant groundsels are rare plants that grow up to 30 feet (9 meters) tall. They are endemic to the slopes of Mount Kilimanjaro ...

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 ...

A cutting-edge technique for analyzing fossil tooth enamel is revealing remarkable new information about 2 million-year-old ...

A cocktail of FDA-approved cancer drugs, trametinib and rapamycin, boosts the lifespan of lab mice by 30% and might help ...

Alterations to a single gene in the plague bacterium's genome have shed light on a method the germ has used to survive and ...

Capture crisp, detailed images — whether you're chasing golden hour, distant wildlife or the Milky Way, these are the best cameras of 2025.