What are the chances that if aliens existed they would look anything like human beings?

I'm an Earth sign -Virgo- my spirit animal and native american zodiac is the bear and my Chinese zodiac sign is the tiger. I'm studying maths, psychology and sociology at college and hope start philosophy next year. I play the piano and violin. Please have a look at my websites: http://thesecretnovelist.weebly.com/ and http://wiccanme.weebly.com/ and follow on twitter @UnderstandWicca