Science theory that is proven to be true becomes science law.

It is a fact that science theories are science theories.

Many science theories have become fact, know as science law.

Big bang is not know to be factual, scientifically. It remains theory.

While the observations prove that black holes are factual, the theory that explains them is known to be the false because of discrepancies with regard to science law.

Evolution as explained by evolution theory is known to not be factual. Cause and effect science law prove this.

While some of the chemical elements in our bodies probably have come from space in the form of meteorite dust and our assimilation of it, it is not a known fact that all material on earth came from space.