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Your weight doesn't change because of gravity but because the floor pushes back. Physicists explain why elevators briefly make you feel heavier or lighter.

In 1974, physicist Stephen Hawking described the potential for tiny, primordial black holes that existed at the dawn of time to explode — and reshaped what we knew about these cosmic behemoths.

A new project allowed AI chatbots to interrupt, stay silent or speak up the way humans do in conversation, and it made them smarter and more accurate.

A new NASA analysis concludes that it is "reasonable to hypothesize" that living things could have formed the odd organic molecules discovered on Mars.

A statistical analysis of a series of signs carved into artifacts from around 40,000 years ago suggests humans developed proto-writing in the Stone Age.

An 11th-century Norse coin found in Maine raises the question of whether the Vikings landed there.

A new method of studying the contents of soil samples has revealed Stone Age people in Sweden were buried in decorated fur-and-feather clothing.

Humanity’s Last Exam is a PhD-level benchmark designed to test the limits of AI reasoning. Although Google’s Gemini 3 scored a staggering 48.4%, experts stress that this does not indicate the arrival of artificial general intelligence (AGI).

Earlier this week, the number of visible sunspots on our home star fell to zero for the first time in 1,335 days. This normally indicates a period of greatly reduced solar activity, but it's still too soon to relax, experts say.

A major shakeup to NASA's Artemis program will step rocket launches up to an annual basis, and discard a Boeing-designed upper stage.

"Monogenic" diseases, triggered by mutations in just one gene, may actually be more complex than scientists thought.