Where did the universe come from? Atheistic origin science has no answer.

[Rampant.A.I.]

That idea is a very, very minority opinion. It is tediously anthropocentric.
It also assumes an impact for which there is no evidence; the evidence points to a glancing blow not involving the cores.

majority theory: cores merged, around 2 minutes on video. but nice try though. http://www.history.com/shows/the-univers...f-the-moon

Clearly, the History Channel is well known for researching claims made on its programs, and only providing the best scientifically accurate documentaries.

Testing the Giant Impact Hypothesis
The initial temperatures of the Earth and Moon, the chemical compositions of their mantles, and the time when their cores formed in principle can be used to test the giant impact hypothesis. Unfortunately, planet formation and the subsequent formation of crusts, mantles, and cores is so complicated that much of the evidence may be destroyed. Furthermore, we do not yet have sufficient data to test all the possibilities.

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One of the most important predictions of the giant impact hypothesis is that the Earth should be mostly molten when it formed. This would have led to complete separation of elements that concentrate into metallic iron when the core formed. The composition of the Earth's upper mantle today suggests incomplete core formation or addition after core formation of a veneer of rocky material containing metallic iron. The problem is that the extent to which elements concentrate in metallic iron varies with pressure, temperature, and the amount of available oxygen and sulfur, and not enough experiments have been done to map out all those variables. On top of all that, the experiments are extremely difficult to do.In addition, the continued growth of the Earth by large impacts might have led to episodes of magma oceans and core formation, not just one event. Each impact would not necessarily have led to a newly homogenized planet, either, as the impactors are thousands of kilometers across. It is not easy to thoroughly mix such huge masses of rock, even if molten.

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In fact, we do not know if Earth's lower mantle has the same composition as the upper mantle today.
The First Few Hundred Million Years of the Earth
Although not proven to everyone's satisfaction, the giant impact hypothesis explains a lot about the Earth and Moon. Combined with our current understanding of accretion, it leads to a dynamic and somewhat terrifying picture of the first few hundred million years for both bodies.

http://solarsystem.nasa.gov/scitech/disp...?ST_ID=446