 You know you have three brains. You have the lizard brain, the fight-or-flight brain, two, three hundred million years old. And then you have the limbic brain, the emotional brain, like a hundred and fifty million years of evolution. And then of course you have the neocortex, the rational, logical, thinking brain, two to three million years. What if I told you that now there is a fourth layer coming, makes you more of a computer? Today's topic is the fourth brain. I've probably read the news this summer about Elon Musk's new tech startup, Neuralink. So what they are working on sounds like total science fiction. They are drilling holes into the brain to connect the computer straight to the neurons, so that we don't have to mess with the time-consuming interface of thumbs or a keyboard or anything like that. According to Mr. Musk himself, this technology will be inside a human being in a year. Of course he's notorious for being a time optimist. But still, in the not-so-distant future there will be human beings among us who are park computers. In the beginning of course this will be used for special cases, like people with disabilities. Like if I'm blind, wouldn't it be amazing if I could just shortcut all my problems and go straight to the nerve system and just give myself a video feed into the brain? But eventually of course in 10, 20 years time most people, at least the ones who can afford it, will be able to upgrade and get themselves a Neuralink. Why would I go to school and study Chinese if I can just download the app instantaneously? I'm in London today to talk about behavioral changes in human beings, and it got me thinking how do we even define a human being? What makes us human? I mean it's easy for us today to think of a Neuralink as a spooky, strange technology, but think about it again. I mean if we would have someone here from a thousand years ago and I would show them this technology, regular glasses, they would think of it as witchcraft, something really spooky. What if people in 100 years time think of a Neuralink as something perfectly normal, just like glasses, who wouldn't need an upgrade after all? Anyhow, I want to hear your thoughts on this. How do we define a human being? How do we determine what's human and what's not? What's a machine? Please share your thoughts in the comments down below and if you want more, hit subscribe and I'll see you in the future.