The problem is no one knows exactly how life was formed. They can only speculate. This leads to an interesting topic though. In our project, we look at Europa, one of Jupiter's moons that shows promise for life, and see why it is believed that Europa is a good candidate for extra-terrestrial life. On earth, life has never been found in the absence of water.
Water is the solvent essential for chemical reactions.
With this evidence we are able to consider a wider habitable zone then once suspected. Europa, on of Jupiters four moons, is believed to have a large ocean under its thick layer of surface ice which would provide one of the key elements required for life. Scientists studying Europa have found evidence in the surface structure which suggests that there is a layer of liquid water or soft ice between the ice and the rock or metallic core. Europa's surface is smooth and crisscrossed with giant cracks and ridges which suggest inner life. The fact that craters do not scar Europa's surface suggests that it is continually resurfacing itself.