Very small, and if you know anything about quantum mechanics, you know how small I mean. The field of quantum mechanics studies the behaviour of subatomic particles, and up to now the world science has looked at it with awe and wonder. Even though the quantum world can be considered to be the basic building blocks of the universe, what we have observed up to now defies the laws of physics. But a recent discovery in new Mexico has recently observed that the quantum weirness we observe when studying subatomic particles may not be so wierd after all, and that the physical universe display much of the same characteristics of these quantum particles. Like the fact that they exist in more than one 'space' at the same time!
"This is a milestone," says Wojciech Zurek, a theorist at the Los Alamos National Laboratory in New Mexico. "It confirms what many of us believe, but some continue to resist—that our universe is 'quantum to the core'."Macro-Weirdness: "Quantum Microphone" Puts Naked-Eye Object in 2 Places at Once: Scientific American