"So many times I've done a CD, and then the week after I record it, I've got this new tagline that's ..." — Joe Rogan

On my left knee I have a long scar from an ACL operation. I've had both knees reconstructed.

Faith itself is a horrible mechanism that stunts the growth of ideas. It also stunts the act of questioning, and it does this by pushing the idea that you have to have faith - and that nothing has to be proven.

What's interesting about science is that we're constantly discovering new things about the universe, about ourselves, about our bodies, about diseases, about the possibilities of the future. It's amazing. Science is one of the coolest things about being a human being - without a doubt.

Your body's really only meant to compete at the highest levels of combat sports for a few years.