Rio Tinto to buy US lithium producer Arcadium in $6.7bn deal

Acquisition by Anglo-Australian miner comes despite global headwinds in electric car market

OpenAI raises $6.6bn in funding, is valued at $157bn

The startup behind ChatGP, which is reportedly planning to become a for-profit business, is now valued on par with Uber

Event will push for greater transparency and aims to rank AI firms in terms of ability to meet climate goals

Bank says new UK compensation rules will fail to curb APP scams and prove financial sector is not the problem

The board has rejected both of Anne Wojcicki’s buyout proposals to save the struggling genetics company

Alternative relationships site says it has resolved concerns about data security that tech firm claims to have uncovered

Move to use shared posts follows information commissioner concerns and sets collision course with EU over privacy

Oil and gas company to use artificial intelligence to speed up decision-making by engineers

Platform registered at industrial estate in Cumbria and catering to alternative relationships has expanded globally

Annual survey highlights growing concern about platform content and trust in information disseminated

Fall overnight comes after it shrinks by $279bn on Tuesday in biggest one-day drop in value by US company

Campaign group says firms such as Uber should reveal data on driver miles to help boost wages

Alex Baldock wants to keep gadgets out of landfill as UK’s largest electricals retailer embraces repair and reuse

Millions of users shut out and 500,000 switch to rival platform Bluesky as providers enact supreme court ban

In isolation, Alexander Grothendieck seemed to have lost touch with reality, but some say his metaphysical theories could contain wonders