Man too smart for himself :)

Some Stats initially:

1) Human neurons operate by sending electrochemical signals that propagate at a top speed of 150 meters per second along the fastest neurons. By comparison, the speed of light is 300,000,000 meters per second, two million times greater.

2) Similarly, most human neurons can spike a maximum of 200 times per second;By comparison, speeds in modern computer chips are currently at around 2GHz – a ten millionfold difference.

3) Machines follow Moore's law, whereas modern humans from primates involved a threefold increase in brain capacity.

i.e we are already at a stage where we have Machines faster and larger than human beings. Now its the third dimesion, being smarter.
Once we attain it, we are surely going to have machines dominating us. Survial of the fittest.

I believe the concept of aliens. And if aliens exists Moore's law would exist there too. Incase they would have build machine faster than themselves, machines would have conquered the planet and would have forwarded towards us. But nothing like that has happened or they have already marched forward, making us a reason for ourselves. May be they know ........... :)