That could be true. I mean the timeframe of our existence is small. Even the mammal timeframe is small, so maybe it intercepted even 1500 years ago and whispered some prophet into his hear or sth.

But there are possibilities to tell if something hasnt changed, like in differences of wavelength or if bigger things in our universe just disappear. Extremly said of course. And too we are in a really early stage of all of this knowledge, so if there is definitly proof of some being, Id think otherwise maybe.

But as we know more and more, we just see evidence of physics.