Neither does science prove what happened, at least with respect to your video and conclusion. True science includes collecting evidence, forming a hypothesis, testing it through experimentation, and coming to a conclusion that is then subject to testing, refinement, retesting, abandonment, etc. A scientific hypothesis can be disproven, but it is not so much proven as it is accepted until a better hypothesis comes along.

To conclude that step one of this process (collecting data) leads to conclusive proof of a theory is not correct. They found a substance, so let's accept that at face value for a moment. Then they went all the way to conclusions about why that substance was there, and who did what to whom. That stops being science. Some might even call it a conspiracy theory.

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