Andrew Huberman· PhD
how is it that we learn not to attack ourselves that's something called thymic selection that occurs in infancy so you and I have a no good for nothing tiny little thymus that would be it's almost impossible to see these things you know when we used to operate on people you know the thymus is barely visible in an adult in a healthy adult outside of thymic tumors but as a CH in a child the thymus is quite large and the purpose of the thymus is to educate te- cells and basically show the te- cells what self is and any te- cell that doesn't immediately recognize it gets killed so it's it's a really clever system where we basically teach you to recognize self at a very early age and if you can't do that you're weeded out and then the thymus involutes thereafter because it's sort of served its purpose