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animal intelligence

Life

Fish size themselves up in a mirror to decide if they can win a fight

Cleaner wrasse use their reflection to build a mental image of their body size, which they use to compare themselves to rivals before picking a fight

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Watch eels escape from the stomachs of fish after being swallowed

Life

Watch eels escape from the stomachs of fish after being swallowed

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SAN FRANCISCO - SEPTEMBER 20: Freshly printed copies of the San Francisco Chronicle run through the printing press at one of the Chronicle's printing facilities September 20, 2007 in San Francisco, California. Newspaper sales in the U.S. continue to slide as people turn to the internet and television for their news. The Chronicle saw its circulation plunge more than 15 percent in 2006 to 398,000 during the week which has hurt newspaper vendor Rick Gaub's business. Unable to sell as many papers as he used to, Gaub is looking for a new way to earn money after selling papers for 42 years. (Photo by Justin Sullivan/Getty Images)

Technology

Nexus review: Yuval Noah Harari is out of his depth in his new book

Culture

An image of a man brushing his teeth with two toothbrushes, one of which looks strange, that has been generated by an AI program

Technology

How to avoid being fooled by AI-generated misinformation

Features

Life

Marmosets seem to call each other by name

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AC4ABH aerial view above four way urban intersection San Francisco, California

Technology

A simple driving trick could make a big dent in cars' carbon emissions

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AI eye technology worn by Julie Hoeflinger, analysing a skull

Video

Can AI make crime scene investigations less biased?

Video

Life

Leeches use their whole bodies to entomb and eat ultra-fast worms

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Life

Charles Darwin’s frogs turn mating upside down

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Will implants that meld minds with machines enhance human abilities?

Technology

Will implants that meld minds with machines enhance human abilities?

Devices that let people with paralysis walk and talk are rapidly improving. Some see a future in which we alter memories and download skills – but major challenges remain

Features

Technology

AI can predict tipping points for systems from forests to power grids

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Life

Sea slugs discovered working together to hunt in packs

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Humans

Why did humans evolve big brains? A new idea bodes ill for our future

Features

Health

The temperature of your face could help diagnose medical conditions

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