Hi everyone, I'm a lowly computer programmer who has been interested in the CMB lately and recently became curious about one thing... As I understand it, the CMB is the left-over radiation from the Big Bang spread uniformly throughout the universe. Does this mean that this radiation is also touching my body and everything I see right now? Does the Earth's atmosphere somehow prevent it from reaching the surface? If it is touching me, then does that also mean that the CMB is also occupying the empty space in my atoms? Or does my body keep it out? Thanks to anyone who sacrifices their time!