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Weekly: Life-saving mice perform first aid; tiny lab-grown human brains; making skyscrapers and hair condition from wood

21 February 2025

Episode 290Mice have been found saving the lives of their cagemates by performing a resuscitation technique similar to CPR. After opening the mouth of an unconscious mouse, the “attending mouse” yanks up its tongue to clear the airways and dislodges...


AI trained on novels tracks how racist and sexist biases have evolved

20 February 2025

Questioning a chatbot that has been trained on bestselling books from a particular decade can give researchers a measure of the social biases of that era


Watch a cuttlefish transform into a leaf and a coral to hunt its prey

Watch a cuttlefish transform into a leaf and a coral to hunt its prey

20 February 2025

In new video footage, cuttlefish show off their dazzling camouflage techniques, such as creating stripes that move over their bodies or mimicking non-threatening objects


Gigantic star has gone through a rapid transformation and may explode

20 February 2025

A red supergiant star appears to have changed in just a few years – an astronomical blink of an eye – which suggests it may be getting ready to explode in a supernova


Why being bilingual really does seem to delay dementia

20 February 2025

Multiple studies suggest that speaking more than one language pushes back the onset of dementia, but doesn't seem to stop it entirely


Why geologists can’t agree on when the Anthropocene Epoch began

Why geologists can’t agree on when the Anthropocene Epoch began

19 February 2025

Nobody doubts that human activities have dramatically transformed Earth, so why has there been no official recognition of the Anthropocene?


When does a bone become a fossil?

15 February 2024

As organic material in a bone gets replaced by minerals over time, it becomes a fossil. But that can happen at different rates even within the same individual


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Cryptic crossword #129: Philosopher seeing total rise in entropy (9)

14 February 2024

Challenge your brain by solving New Scientist's weekly crosswords on your mobile, tablet or desktop


Male Andrea cuttlefish (Sepia andreana)

Male cuttlefish burst through their ink clouds to impress females

14 February 2024

Cuttlefish usually use ink to confuse predators – but one species uses it as a dramatic backdrop, bursting through an inky cloud during courtship displays like a stage performer making a spectacular entrance


Small dogs are more likely to have an extra row of teeth like sharks

13 February 2024

Some pet dogs retain their baby teeth, creating two rows that resemble the mouth of a shark. A new analysis shows that the condition is more prevalent in smaller breeds and obese dogs


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