David Kipping

It was more likely to be dust.

Dust is chromatic.

By chromatic, I mean it looks different in different colors.

So it blocks out more red light than blue light.

If it was a solid structure,

shouldn't do that.

It should be opaque, a solid metal structure or something.

So that was one of the clear indications.

And the behavior of the way the light changed or the dips changed across wavelength was fully consistent with the expectations of what small particulates would do.

And so that's very hard.

The real problem with alien hunting

The technical term.

This is the real problem.

The one problem.

Actually, I'd say there's three big problems for me with any search for life, which includes UFOs or the way to fossils on Mars.

is that aliens have three unique properties as a hypothesis.

One is they have essentially unbounded explanatory capability.

So there's almost no phenomena I can show you that you couldn't explain with aliens to some degree.

You could say, well, the aliens just have some super high-tech way of creating that illusion.

But