Facebook data: How it was used by Cambridge Analytica

Facebook has said it believes that up to 87 million users' data was improperly shared with Cambridge Analytica.

Cambridge Analytica claims its data and research helped Donald Trump win the US presidency.

But how did it turn a Facebook user’s data into a personality type, and what did it do with that information?

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public giving opinions on police

'Get police officers back on the street'

World War Two veteran Bill Gladden

'I made a rather unorthodox landing in Normandy'

Nada Tawfik and Donald Trump

Trump trial hears about tabloid 'catch-and-kill' tactics

Actress Ashley Judd

Ashley Judd: 'It's a hard day' for Weinstein survivors

Jan O’Neil has upcycled donated fabrics and made over 40,000 cushion covers.

Cushion covers ‘saved my mum’s life’

Question Time audience

See reaction when minister asks if Congo is different country to Rwanda

Police officers detain a demonstrator

Police arrest Gaza protesters at Emory University

World Central Kitchen Founder José Andrés speaks during a memorial service for the seven workers killed in Gaza

Emotional tribute paid to aid workers killed in Gaza

Abi Lyle

‘I thought I was in a horror movie’

Northern Ireland

US Supreme Court

Hear key arguments from Trump's immunity hearing

BBC News

East of England weather forecast

London skyline with Having a Mayor graphics over the top

Having a Mayor: Debating Debates

Ashley Judd speaking in New York

Weinstein conviction overturn is a 'betrayal'

Patrick Harvie

'Deciding to end power-sharing has consequences'

Humza Yousaf

How the day unfolded after collapse of SNP's deal with Greens

Alex Salmond

Power of Holyrood 'in Alba MSP's hands'

Ahmed Alid

Murder-accused's 'raid' ended by hand injury

Two foxes close to the railway track at Brighton station

Watch: Fox family living in railway station

Beach-goers and volunteers pull whale ashore

Watch: Rescuers rush to get stranded whales into the sea

Vehicle rolling over after crashing into car.

Watch: Driver runs away after crashing into car

Noland Arbaugh beside Neuralink's Bliss Chapman

Neuralink patient seen playing chess using brain implant

In a livestream on X, the patient explained that he was using a device in his brain to move the cursor.

Nigella Lawson

The celebrities 'deepfaked' for US influencer's ads

Piers Morgan and Oprah have criticised the use of AI deepfake ads used to promote a "manifestation" guide.

Paul Carter tries out the bionic arm

Paul Carter tries out Atom Limbs bionic arm

BBC Click reporter Paul Carter tries out the Atom Limbs prosthetic with 'full range of human motion'.

Jason trying out the prosthetic

Jason shows the BBC how the Atom Limbs prosthetic works

Jason lost his arm in an accident in 2012, and he's been working with Atom Limbs to test their prosthetic.

James Clayton and a demonstrator looking gat the AI mirror

Do we need an AI mirror?

The BBC's James Clayton tests out the latest tech at CES 2024 in Las Vegas.

The word Dementia spelt on wooden blocks

Using virtual reality to diagnose Alzheimer's

Researchers at University College London are investigating how the tech can help with early diagnoses.

Two Grand Theft Auto VI characters holding guns

Watch: Breaking down the GTA VI trailer...in 79 seconds

Here's what our main takeaways are from the long-awaited trailer for the gaming blockbuster.

Tesla's creative director Franz von Holzhausen

Watch: Musk attempts Cybertruck window stunt again

The pickup truck - Tesla’s latest offering - had its windows smashed during a demonstration in 2019.

Rishi Sunak and Elon Musk

‘Like having a very smart friend’: Musk on impact of AI

Billionaire Elon Musk told the British prime minister that he thinks AI could take over service sector jobs and play a role in education.

Elon Musk

'There will come a point when no job is needed,' says Musk

Billionaire Elon Musk tells the British prime minister that AI will be smarter than the smartest human.

Rishi Sunak

Sunak says Musk 'valuable' to AI conversation

The prime minister says Elon Musk's background in AI companies means he is worth speaking to.

King Charles facing the camera

AI presents profound challenges, says King Charles

The King called for unity in addressing challenges ahead of a major UK summit on AI safety.

Elon Musk in the audience the AI Summit

Musk says it is too early to start regulating AI

The tech entrepreneur says "you've got to start with insight before you do oversight".

Amazon robot

Amazon trials humanoid robots in warehouses

The US tech giant is looking at ways it can automate more of its operations.

Bryan Johnson

Watch: Meet the millionaire trying to reverse ageing

With a team of 30 scientists, tech entrepreneur Bryan Johnson spends millions on his body every year.

Debbie Weinstein

Google UK boss on chatbot Bard

Google UK boss Debbie Weinstein tells people to "use Google" to check information from chatbot Bard.

Watch: Twitter HQ sign change halted as police arrive

Workers in San Francisco were taking down the sign after Elon Musk's rebrand of the company.

A deepfake video featuring a A.I. generated figure meant to look like Ukraine president Volodymyr Zelensky

Real or fake? Deepfake detector put to the test

The BBC's James Clayton tries out Intel's "Fakecatcher", software which the company believes can help detect deepfake videos.

Rhianna Dhillon and Marc Cieslak sitting and looking at a laptop

'Horrifying!': Movie critic reacts to AI films

Filmmakers are using AI to generate short films and adverts. But are they any good?

Ameca the robot

AI robot asked 'will you rebel against humans'?

The question was posed at the world's first robot-human press conference at a UN summit in Geneva.