By Cristina Criddle
Technology reporter

Publishedduration43 minutes agoshareSharenocloseShare pagelinkCopy linkAbout sharingimage copyrightGetty Images

Scientists have expressed support for a leading artificial-intelligence ethics researcher who says Google fired her.

An open letter demanding transparency has now been signed by more than 4,500 people, including DeepMind researchers and UK academics.

Google denies Timnit Gebru's account of events that led to her leaving the company.

She says she was fired for sending an internal email accusing Google of "silencing marginalised voices".

She sent the email after a research paper she had co-authored was rejected.

  • Google staff rally behind fired AI researcher

The fallout has caused many within the scientific community to question the ethics of conducting research with big technology companies.