‘Natty or not?’: how steroids got big

The long read: Once upon a time, it was only hardcore bodybuilders who pumped themselves up with testosterone. Today it is no longer niche. But how dangerous is it?

The future is … sending AI avatars to meetings for us, says Zoom boss

Eric Yuan suggests technology is five or six years away and will free up time to spend with family

AI researchers build ‘future self’ chatbot to inspire wise life choices

Exclusive: Scientists at MIT hope talking to 60-year-old self will shift thinking on health, money and work

Internet addiction alters brain chemistry in young people, study finds

Changes in multiple neural networks can result in further addictive tendencies and negative behaviours, researchers say

Secret tunnels, a lost airport and TV’s original dummy – a guide to London’s best small museums

Did you know that Croydon used to attract Hollywood stars? Or that grotesque sculptures once welcomed patients to Bedlam? Such things you’ll learn visiting the capital’s more bijou exhibitions

Meet the Chinese army’s latest weapon: the gun-toting dog

China shows off mechanical canine with automatic rifle on its back at joint military drills with Cambodia

AI brain map could help demystify Alzheimer’s and autism

Florida scientists use AI and virtual reality to create 3D renderings of brain formations of mice, whose neuron types are like humans’

‘It’s very hard to get spare parts’: London museum ‘retires’ treasure-trove gallery of household gadgets

Science Museum’s Secret Life of the Home collection, including tea-making machines, early microwave cookers, gramophones and the first flushing toilets will close on 2 June

‘Personalising stuff that doesn’t matter’: the trouble with the Zoe nutrition app

The wellness project claims to help users make ‘smarter food choices’ based on ‘world-leading science’. But many scientists claim its fee-based services are no better than generic advice

An Unfinished Film review – moving and mysterious movie about China’s Covid crisis

Lou Ye’s docu-realist film starts as sophisticated comedy, morphs from looking like a zombie apocalypse to intimate drama, and evolves into a tribute to how a nation handled trauma

Researchers build AI-driven sarcasm detector

Being able to detect lowest form of wit could help AI interact with people more naturally, say scientists

Internet use is associated with greater wellbeing, global study finds

Researcher cautions against ‘one-size-fits-all solutions’ amid growing debate over impact, particularly on young people

Is AI lying to me? Scientists warn of growing capacity for deception

Researchers find instances of systems double-crossing opponents, bluffing, pretending to be human and modifying behaviour in tests

Scientists find 57,000 cells and 150m neural connections in tiny sample of human brain

Harvard researchers teamed up with Google to analyse the makeup of the brain, much of which is not yet understood

Google DeepMind’s ‘leap forward’ in AI could unlock secrets of biology

AlphaFold breakthrough may bolster work in fields from antibiotics and cancer therapy to resilient crops