If you could shrink something and still have its atoms behave the same way (you feel, think and react the same way with whatever got shrunk with you, including gravity), how would it affect us? Imagine shrinking a planet to the size of a nickel track each atomic particle with a tractor like energy beam (it records how the atoms move, electrons and all) so that you can literally rewind the entire planet to make changes. When you are satisfied with the results, you can enlarge it again with the size of your current universal dimensions. In the process of being rewound and forwarded, to the being experiencing it, everything is normal. Every bit of energy and atomic structure is controlled by this beam.

Do you think this kind of science is a possibility at all?

No. An atom and especially its sub atomic make up are not actually physical objects as you're perceiving them. You can't change their "shape" - they have no shape. Read up about quantum science, you'll realise how unintuitive the sub atomic world actually is.

One thing I've always wondered about shrinking at the atomic level - if you could do it, and shrink a person down, would they still be able to breath?

Would the normal sized air particles be too big for atomically shrunken lungs to handle?

i am firmly opposed to shrinkage