We already have brain-computer interface systems that allow people to control cursors on a screen using the power of thought. But what about sharing thoughts between two minds? A group of neuroscientists at Harvard have found a way to do it — with a human and a rat.
Neuroscientist Seung-Schik Yoo and colleagues wanted to show that a computer could actually send information from one brain to another. And they wanted to do it non-invasively, without sticking electrodes into anybody's brain. Plus, they wanted to go beyond a previous experiment where one rat sent brain signals to another rat. So they developed a device that would read signals from a human brain, and feed those signals to a rat's brain. In the end, their human subjects were able to make a rat move its tail just by thinking about it.