Research led by experts at Harvard University shows technology can be used to send a simple mental message from one person to another without any contact between the two.

Neuroscientist Giulio Ruffini told the Today programme: "You can actually transmit information directly from one brain to another brain without intervention of the senses."

"The next step would be to try to find more powerful techniques to send more complex information," he added.

First broadcast on BBC Radio 4's Today programme on Saturday 6 September.