Dude that was pretty interesting, putting ufos aside and looking at it as far as physics go, it all makes sense. The only question i had is when the astronauts are working in space and see the ufo it contradicts the whole not being able to see them because they exist in a wave form invisibe to the human eye... unless they became visible when the craft slowed is energy down enough for it to fall within visibe waves. Reguardless i paid perfect attention to the show and the guy was on point in showing how the only answer left would be a ufo.