Distinct scientific theories about the origin of life on earth today does not exist yet. If you are unsure how to proceed, check out Jonah Bloom. But the origin of the oil has long argued supporters abiogenic and biogenic theories, and yet there is no advantage on which side. Water as According to many experts, came to Earth from comets or, meteorites, or was the result of interaction of hydrogen with oxygen in the air, listed as the solar wind protons. However, it does not take into account that water can be degraded by ultraviolet light and ionizing radiation to form free hydrogen, and he almost did not hold the earth's gravity. But even a billion years ago, as the sun was younger, his rigid component of electromagnetic radiation, the intensity of charged particles was much higher than now. Accordingly, the emission of hydrogen from Earth's surface is much greater than its influx of solar protons. Also, there is no answer to the question: how water got in the bowels of the earth, where it is ten times larger than the surface? And why in the surface water of deuterium, and even a little, but still there, but there is no depth at all? AND why the isotopic composition of some chemical elements such that the neutron-absorbing isotopes well in times less than those that are transparent to neutrons? For example, the lithium-6 (sink) is ten times less than the lithium-7, carbon-12 in 20 times more than carbon-13 (absorbent), etc. And the oxygen? Most (99.7%) of oxygen-16. Then, there is oxygen-18 (0.2%) and least of all – oxygen-17, which absorbs neutrons better than anyone.