Alien's drawing?

I do believe that there are other intelligent creatures in this universe, maybe in many galaxies away. But I personally do not believe that the other intelligent creatures or aliens have ever visited the earth. All of the reports about U.F.O. were fake, I think.

But when I initially found this huge drawing on google map of Australia, I thought this may be written by an alien.... As you see, this drawing is too big to be drawn by ancient human beings.

Take a look at google map!