Does evolution explain intelligent life?

I do believe in evolution – it’s a proven fact. However, the new series, “Ancient Aliens” really has me thinking. Why are humans so different from animals? If we evolved from apes, why are there still apes? If evolution explains intelligent life, then why has no other species on this planet evolved into an intelligent society. They have been here as long as we have, and some have been here even longer. If we could send a probe into space and find the millions of life-supporting planets that are surely out there, would we find just world after world of animals? I am interested to hear your views.