The effort needed to fabricate all the evidence to the contrary would be far too ridiculous for consideration.

The fossil record alone would require a borderline omnipotent entity to fake. And yeah, there are some ever shrinking gaps in it but trying to fit the entire "humans are actually from Mars" theory in it is beyond absurd.

And then you have the mitochondrial DNA and other factors which allowed us to map the Tree of Life of all known organism, a model thwt we fit into quite well.