Life on Earth Began... {BP2}

"When the earth formed some 4.6 billion years ago,
it was a lifeless, inhospitable place" http://www.eddieting.com/eng/originoflife/orgel.html

Many scientists believe that life on Earth began by accident in something called primordial soup, a "liquid rich in organic compounds and providing favorable conditions for the emergence and growth of life forms." In this theory, there had to be certain "life ingredients," which contained food, water, energy, methane, hydrogen, water, and a electrical spark to kick-start life on Earth.

Another theory was that life came from outer space in an asteroid or comet that struck Earth.

Life on Earth, scientists believe, must have began in the oceans. The reasons why the oceans were where life began was because the surface of the Earth was inhospitable, making the conditions difficult or impossible for harboring life. Because of asteroid strikes, volcanic eruptions, and deadly solar radiation, life beginning on earth's surface would make it difficult to sustain. The oceans, on the other hand, protected potential life from all of those deadly forces. Because of the oceans, life is possible. Without the oceans, it's improbable life as we know it would exist on Earth.