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Technology

鈥楥linical-grade鈥� AI stress detector doesn’t work, study suggests

An AI-powered test that claimed to be 鈥渃linical grade鈥� listens for signs of stress in people鈥檚 voices. But it provides inconsistent results when tested on the same person twice, according to a study

News
Sir David Attenborough

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The 12 best science documentaries of 2023

Culture
person with prosthetic limb

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Spinal cord stimulator dramatically reduces phantom limb pain

News
The man smoke an electronic cigarette on the dark background; Shutterstock ID 519015292; purchase_order: -; job: -; client: -; other: -

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Patchwork vaping regulation can show the way to a smoke-free world

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Two women choosing food in a cafe

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Why does weed give you the 鈥榤unchies鈥�? Here’s what the science says

News

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Cannabis addiction may be partly down to genetics

News

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We need a wake-up call when it comes to adolescent sleep

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Sugar-replacing tablets with a spoon on a pink background.; Shutterstock ID 1326637646; purchase_order: -; job: -; client: -; other: -

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Sweeteners: The bitter truth about low-calorie sugar substitutes

Features

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Mysterious cannabis-induced vomiting syndrome is on the rise

News
CARDIFF, WALES - FEBRUARY 23: A teacher wearing a face mask teaches a child at Roath Park Primary School on February 23, 2021 in Cardiff, Wales. Children aged three to seven began a phased return to school on Monday. Wales' education minister Kirsty Williams has said more primary school children will be able to return to face-to-face learning from March 15 if coronavirus cases continue to fall. (Photo by Matthew Horwood/Getty Images)

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HEPA filters cut covid-19 sick days but we’ve been slow proving this

Covid-19 sick days were 20 per cent lower in schools with air-cleaning HEPA filter machines, researchers on an eagerly-awaited study have found. But why has it taken so long to discover how well they work, asks Clare Wilson

News

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Focusing on health rather than disease will make us all feel better

News

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Wildfire smoke is reversing decades of progress on clean air

News

Mind

We may finally know which brain cells cause motion sickness

News

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Your ultimate guide to ultra-processed food 鈥� how bad is it really?

Features