See my previous comment on the topic https://news.ycombinator.com/item?id=21860860
I found out later this is a rare mirage that occurs when a thermal inversion causes light on the horizon to bend.[0]
if this occurred at night and those mountain peaks were replaced with something like car head lights, I may have walked off that mountain as a UFO believer. I’m not saying this explains away all the UFO sightings. Only suggesting that there could be a lot rational, yet obscure, explanations that haven’t been considered.
I believe they exist because of the videos and statements. I believe they're man made for the reason I stated above.
>What's your guess on how the boys filled that gap?
That's a lot harder to answer. The short version is, I have no clue. We could speculate forever. We do know that stealth technology existed for years before the public was informed, as one example of many. And we know that agencies like DARPA and programs like Skunk Works exist and are extremely well funded specifically to develop new technologies for military use. I submit that we do not know about every technology these sorts of entities have created. How far those technologies go? Man, I'd really love to know! I'm hopeful these videos are a glimpse of that.
One of these is not like the others.
Why do you think it's less plausible that humans have this technology than any other intelligent entity? There's no real reason to believe there's a sharp line between "human" and "other" capabilities. If the alternative is literally aliens, it's not a large stretch to imagine that once you've had the right insight, a Mach effect drive or something similar is possible.
The part of that story that's harder to believe is that we could have successfully kept it hidden this long.