IPFS News Link • Science, Medicine and Technology

Quantum to cosmos: Why scale is vital to our understanding of reality

• arclein

To make matters worse, we are also forced to use separate theories to describe these forces. Albert Einstein's theory of general relativity describes gravity on the scale of stars and galaxies. Meanwhile, the other three forces are governed by quantum mechanics, which applies to the subatomic realm. We have yet to find a way to meld the two into a theory of quantum gravity. "One of the biggest problems in physics is the disparity in scales between the size of atoms and the size of the universe," says Barr. Perhaps our struggles with scale are telling us something deeper about the universe. Maybe, at the fundamental level, there is no scale at all.