What if the ET's are helping with that aspect though. Or even entirely responsible for the secrecy.
If they have time travel ability they could manage their public perception any way they like.
They could edit history to suit their own agenda.
Yep. I try not to raise this point too often because it sounds so crazy until you study the theoretical physics behind it, but if some or most of these devices utilize a gravitational field propulsion technology – and the observations do conform beautifully to the explicit predictions of that model, then these devices represent a true spacetime technology. While we humans are still bumbling around engineering within the limited context of special relativity, these devices clearly appear to represent a genuine general relativistic technology – which is an absolute game-changer.
We’re moderately comfortable with the “space” aspect of a spacetime vehicle – star-hopping, so to speak, but curving spacetime entails manipulating time as well. And the mere existence of such a device would prove that substantial negative spacetime curvatures can be produced technologically – which opens the door to things like wormholes and time travel, according to the general theory of relativity. But really we already have proof that negative spacetime curvatures are physically real, because that’s what appears to have driven the inflationary epoch of the Big Bang, and what’s driving the present cosmological acceleration (aka dark energy) as well apparently, plus,
a 2014 theoretical paper showed that the positive energy theorem doesn’t apply to our universe for these reasons as well as a formal differential geometry proof.
I remember seeing photos of a distinctive hat-shaped ufo that was photographed in the 50s (I think) through the window of a pickup truck, and an identical-looking hat-shaped ufo in a photograph halfway around the world and many years later (decades, iirc). So was this; two different but similar-looking devices traversing the sky years apart, or the same device returning years later, or was it the same device traveling through time moments apart from the reference frame of the device? According to our best physics model, all three of those possibilities are physically viable.
If we’re dealing with civilizations capable of that level of time manipulation, then we would appear to them as Flatlanders in the famous thought experiment (this is one of my favorite moments in Carl Sagan’s marvelous Cosmos series):
Think about that seriously for a moment, because we have every reason to think that’s possible, given what we know about theoretical physics today. A newborn infant in diapers is on a more equal plane of existence with us, than we would be with a civilization that readily manipulates the physics of spacetime.
Now let’s go down the wormhole for a moment to consider one of the many mind-boggling possibilities that time travel might present for a species that advanced in the physical sciences.
The only apparent solution that I’ve found to the problem of the Grandfather Paradox, stems from a theoretical model published by a brilliant theoretical physicist at USC named Dr. Itzhak Bars (I used to read his pre-prints about superstring theory when I worked on his floor at the graduate physics office at USC, coincidentally). Dr. Bars has shown that our universe could be the four-dimensional “shadow” of a six-dimensional universe with a specific gauge symmetry. This 6D universe has two time dimensions and four space dimensions, but it appears to be a 4D universe due to the gauge symmetry. Now if there are two dimensions of time, then infinite temporal possibilities exist at each moment in time, like the radial directions surrounding a point on a sheet of paper, so one could follow a curving trajectory back to the same point in time without violating what we might call “global causality” – the higher-dimensional answer to the linear causality that we all know and love. Think of it like moving in a line across a sheet of paper in the forward time direction, then circling back to a point behind you to start a new branch of forward-moving time, except this time you’re in two places at once – your current self, and your previous self, who might look out the window and wave at you. The previous timeline still exists, unaltered in the plane of global causality, but now you're creating an additional and independent timeline on the same plane. The two versions of yourself are now writing a new linear causality sequence together, exploring the additional degree of freedom provided by the second dimension of time, which together define the total plane of time rather than merely a single line.
In practice this would mean that you could pick a position, say, behind the Moon, and wait a moment, then travel back to your arrival, and wash, rinse and repeat, until you had an armada of versions of yourself aboard your spacetime vehicle, all neatly lined up together in formation. Then you could emerge from behind the Moon, in what would appear to be an instant later to us Earthlings, with a hundred or a thousand or more versions of yourself ready to conquer the Earth. All 100% paradox-free thanks to the second dimension of time.
Since we’re already way the hell out there, I might as well mention that the mystics have been describing a second perpendicular dimension of time for eons – they usually call it “eternity” to distinguish it from the ordinary notion of time. The general idea is that our internal monologue of uninterrupted thought tethers our consciousness to the single dimension of forward-moving time, but if we can achieve internal silence for 44 consecutive seconds, then we suddenly become aware of the additional time dimension. One theory I’ve read even claimed that the cross signifies this intersection of two dimensions of time, but I don’t recall if the idea was that Jesus sacrificed himself on a cross to immortalize the concept of two dimensions of time, or if that was only an interpretation proposed after the fact. Anyway, the whole idea is that the awakening/enlightenment experience shared by Buddha and Christ and the other avatars was the conscious awareness of this additional “eternity” time dimension.
I find it fascinating that two such wildly disparate realms of human thought could arrive at the same very exotic idea, which just happens to resolve one of the most famous paradoxes in modern physics.