Why a Scientist believe that a man came from a Monkey?

If that so why their still more monkey. And if a Giant Gorilla evolve to human what its looks like? I think a Giant man came from Giant Gorilla. If those small monkey evolve... I think those dwarf people came from small monkeys.

And if Kingkong will evolve, what would be the result? What do you think?

And to those who believe that they came from Monkey, what race of monkey do you belong?