Planet life

We all searching life on other planets and now we quite unsuccessful. But what if every planet have life from perspective of 4th dimension.  I mean in some period of Universe life every planet have it own life but at same time there is no other planet with life. Life on the exact planet can be only one solution of hard life function. But for robot civilization it is possible to have life for example on mars or moon. For humans or batteries or plants its sound unreal.