Freakonomics

Here we go again. The next question for this month is 'How is this universe working?'.

Oh.. Hang on, before I can ask that question to myself I need to explore on 'Is human is a very Intelligent animal?' Well.. scientists say so.
But, I need to ask myself why should I call Humans as Intelligent animal? After all, they are also just one among several animals of universe.
Again, scientists have given reason for this question as 'Humans have very well formed and well developed brain?' But, being a very practical person I cannot agree on that statement. Just because, I cannot measure/analyse /assess that statement. Also, the statement has been written by Humans only. I don't remember any other animal saying so.

Can we claim ourselves as intelligent just because, we can destroy other animals to extinct? or we can just destroy our nature as we need? or we can just make electrons to run in a path? or we can run a multi-billion dollar business? or we can just give a visit to moon and come back without any risk of life?
I will post a reasonable answer whenever possible. Till then start thinking?