"Neurobiologists have shown that brain signals from multiple animals can be combined to perform certain tasks better than a single brain."
2015-07-09, MIT Technology Review
"Researchers at Duke University have enhanced the mind power of monkeys and rats by linking their brains together"
2015-07-20, Smithsonian magazine
Reference: Steve Hoffman - Brain Hacking & MindTech - Silicon Valley Innovation Channel
https://www.youtube.com/watch?v=p_TQBjFkv1Q&t=412s
“They did an even more advanced experiment at Duke University. They had three monkeys with chips in their brain. Each of these monkeys can only see in two dimensions (2D). But the monkeys together are rewarded with a treat, with some good food, if they can move a dot on the computer screen, in 3D space, to the right location. Each of these monkeys can't do it alone; because they can only see 2D; they can't move in 3D."
"But together, all three of those brains, learn how to work together to consistently move the dot to the right 3D location. That finding is actually amazing. What it is telling us, is that when multiple brains are wired together, they can perceive the world in a way that a single brain might not be able to do. They are collectively working as a single intelligence. Now, the monkeys aren't consciously aware that they are wired to other monkeys’ brains. They don't have to know that. They are actually just getting the information and perceiving it intuitively.”
Relevant media article citing the corresponding scientific publication: Scientists Connect Monkey Brains and Boost Their Thinking Power