AI made from living human brain cells performs speech recognition

Balls of human brain cells linked to a computer have been used to perform a very basic form of speech recognition. The hope is that such systems will use far less energy for AI tasks than silicon chips. "This is just proof-of-concept to show we can do the job," says Feng Guo at Indiana University Bloomington. "We do have a long way to go." Brain organoids are lumps of nerve cells that form when stem cells are grown in certain conditions. "They are like mini-brains," says Guo.