There are 2 main theories;

1. The primordial soup theory.

The basic premise of this theory is that the basic elements required for life were floating around in the ocean w/e and with the scope of this eventually combined to form life.

2. Panspernian Theory

Life started elsewhere, and was transported here on a comet.


Basic Outline but bare with me, the 2 theories state that life would at one stage have had to combine to create life somewhere in the universe, the debate is simply whether it happened on Earth or not. The notion that it was created on Earth has much more weight behind it than than otherwise.

Ryot,