Question: What is the biggest amount of a persons/animals brain that has been unlocked?

Robert Lees answered on 14 Nov 2015:

We know a lot about the human brain and possibly even more about a few animal brains – such as mice and rats, because we use them in so much of our work. We have ‘unlocked’ the structure and function of most areas of the human brain and some animals. We are trying to understand how they are connected together, because different areas of the brain talk to each other. It’s hard to say how much we know, because we don’t know how much there is to find out!