Are humans in fact aliens on Earth?

Earth is still our only home but are we really created in the same way as all other species on our planet like Darwin's theory of evolution suggests? Humans are lot different from all other species on our planet, and the fact that there are certain similarities between us and apes isn't enough to establish a plausible link like the theory of evolution suggests. At least I don't think so.

The mystery thing in this equation is our supreme brain size. It is completely illogical to believe that humans have all of the sudden evolved into super-smart creatures while this hasn't happened with any other species on our planet, some of which have been on our planet for lot longer time then we have.

Such a rapid advance from hiding in the caves till putting your foot on the moon's surface cannot be explained with the theory of evolution because the nature doesn't work that fast, nor does it explain why this jump in intelligence happened only to humans.

From the logical point of view I find it much easier to believe that we have been visited in the past by some technologically superior alien race who decided to do a little genetic experiment by implementing some of their genes and giving us the ultimate gift of knowledge.

The modern genetics has just started developing and will no doubt give us many new fascinating discoveries about our gene structure and what genes can be connected with other species on our planet and what genes are solely our own, looking like being artificially implemented into our genetic code.

The further development of genetics is a key factor in answering the question about our origin though we may never learn the truth about why are we really here and what is our role in this gigantic Universe.

The alien genetic code could be residing in each and every one of us giving us edge over all other species on our planet.

What are your thoughts on this matter?