What does the Casmir Effect indicate a fifth force of Nature?

Answer 1

The Casimir effect is a physical force exerted between separate objects, which is due to neither charge, gravity, nor the exchange of particles, but instead is due to resonance of all-pervasive energy fields in the intervening space between the objects. This is probably the reason why it's been called he fifth force of nature.

However, we cannot call Casimir Effect a real force, because a force by definition must extend fields in space, communicate via virtual exchange particles, etc. etc.

Answer 2

Did you mean casimir?