The first is "entanglement". That comes from the strange and weird world of quantum mechanics where it says that two particles can react with each other at a distance. That distance can be a hairs width away or the whole way across the universe. Distance doesn't matter. You can google it and read to your hearts content, but if you are like me, you just can not understand it. Blows my mind. In fact this inter-reaction can happen faster than the speed of light. This has been scientifically proven. Even Einstein called it "spooky action at a distance".
The second concerns the cosmic microwave background. I have trouble understanding how microwaves can be coming from every point in the universe at about the same intensity. It is like a glow left over from the "big bang". That would mean there must be the same amount of "stuff" in any direction we look. Wouldn't that put us in the center of the universe??? I don't know about you, but I am the center of my universe (grin). Well, not exactly, my wife, our family, and our pups are the center of my universe, how about yours? Now have a great day where ever you are in this universe, you hear?