@wonderofscience To be fair, the top image should be Robert Goddard with his similarly early liquid rocket, which would have dated to 1926. So, 53 years from the earliest liquid fueled rockets.
Ummm, you mathed wrong - it was 53 years apart and we are now that far along from the second now as the first was from the second.
All we have to show for it is the iPhone. Our early promise has rewarded us with good stuff - no doubt, but the scope of human progress since the moon landing is a tepid cup of tea at best by comparison.
I'm using this to point out that Wrights didn't just pop out from the sea, but that they stood on the shoulders of others.
The missing piece was their skill as bicycle manufacturers to bring the weight of the components down.
(There are stories of unthethered flight before Caley, but as the saying goes: inventor is the one who invents something last (eg. writes their method down and demonstrates use worth copying the method), not the one doing something first.)
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@wonderofscience This reminds of something that's been on my mind lately.
During this period of rapid development of aerospace tech we believed that we'd have colonies on Mars in years. Yer shortly after the progress seemingly stalled. Problems have become more difficult.
In the recent decades we've seen similar progress, but with information tech. And it is obvious that the growth we've seen is over. All the easy problems have been solved. And the recent crypto and AI bubbles are just copium.