Fascinating questions for sure, none of which I can add anything tooIf tictac is military, they have been able to find the solution to the heating problem when traveling at mach 22 within the last 9 years. The best they could manage in 2012 was 13,000mph for 9mins before meltdown.
Not only that, they have also managed to reach that speed in under 0.5 seconds whilst being able to change in any direction in an instant. That tells me they have developed a new type of propulsion system.
I'd also like to know what material they are using.
My view on these things is simple.
1) I believe it possible that there could be worlds outside of our world with living things.
2) I believe it possible some of those are far far more advanced than us, some at a similar level and some in their infancy
3) I have not seen any credible evidence today that they have visited us, but again I remain open minded (it would be ace if they had)
4) Experience of 53 years of life teaches me that this is more likely a human creation.
5) Innovation often comes from progress and involves small tweaks over many years but sometimes comes from revolution (in short or moment in time events).
All conjecture but fair I think.