Doing some research on your own will show that there are scads of hypotheses and theories in the evolutionary community as to the origin of life.

Here are some keywords to look up:
Abiogenesis
Panspermia
Astrobiology
Exobiology
Clay Theory

Of course, these hypotheses all have some criticism, but that's why they're hypotheses.

Methinks this is a discussion for the "other" section of this forum.