Why must this talk of other life forms always assume that they are more advanced? Perhaps the most advanced life forms on this other planet, if these unobserved life forms exist, are lizards or some heretofore un-named kingdom of creature.
Because the joke wouldn't work the other way. I think the scale is so incomprehensible, both in time and space, that if other life did evolve the odds of us being the most advanced is slim.