Objects that we are familiar with are comprised of building blocks of ultra-small particles at molecular, atomic, or even subatomic scales. When we enter the nano world of atoms and subatomic particles, things become strange and do not follow the same rules as the world we live in. This is the world where the distinction between waves and particles become blurry, where things without mass can have momentum, where elements can break apart or fuse, and where time and space are no longer constant. this is the world of modern physics developed from 1900s.