LH: Why? Both have a lack of evidence to support their origin of the cubit.
SC: Perhaps. And that is why both are presented as an hypothesis. But I personaly I prefer the hypothesis that suggests humans were responsible rather than 'ancient aliens'. Of course, it is not beyond the bounds of impossibility that ancient aliens were involved but as you often like to say:
“In science, "fact" can only mean "confirmed to such a degree that it would be perverse to withhold provisional assent." I suppose that apples might start to rise tomorrow, but the possibility does not merit equal time in physics classrooms.” -Stephen Jay Gould