.... from the infinitely small to the infinitely large ....

Physics has no limit. There is nothing in our universe which escapes its study. From the most exotic elements in the quantum world to the ultimate limits of the cosmos, everywhere there is a phenomena that remains not understood, physicists try to explain and model it. No measurement frightens the physicist, from the yoktometer(10^-24m) to the yottameter (10²⁴m).