This 'revelation' of being part alien came to me...
I don't know......
However, every human carries on average 2.5% neanderthal DNA with some outliers 5% or above.
I believe that Ozzie has the high percentage, which he is very proud of...
http://www.youtube.com/watch?v=ZcoweoZ6jpM
On a more serious note:
Multicellularity has evolved independently at least 46 times (on earth)
Eye (an organ of sight) has evolved independently 40-65 times
True Intelligence with sustained ability to create and manipulate environment-only ONCE in one or two primate species
If something happens just once-you don't know the probability of this event because of the observer bias. It could be 1:100000000000 chance or even lower.