There can be a tendency to think of the past through a bias that says we are smarter. It is not a new bias; every generation tends to indulge.
In 1899, Tesla conducted an experiment of utilizing the Earth's own electro-magnetism to generate power. His experiment sent bolts of high powered electrical frequency shooting outward, it rocked the area of the test, and created localized lightening storms. The "message" he sent was in common dot and dash format (the Morse Code). It was already recognized as being sent and read. Surprisingly there were responses to his signals that were "periodic" and thus outside the natural response range. He felt they were responses to his messages.
In 1901, Marconi of radio fame, sent the letter "S" across the Atlantic for the first time. Tesla said his equipment once more picked up the regular pulses of earlier and they were not of the same character as solar radiation he had already recorded and studied. There was an odd regularity and promptness to the responses that raised questions. Tesla thought them too reactive to be natural random events. He would later send and receive the signal for "V."
1921, Tesla reported he had been receiving strange, unidentifiable radio signals with an unnatural regularity. He felt they contained a code and the only recognizable part of that alleged code was the letter "V." This connection to the code Marconi had sent years before only deepened the mystery.
At this time the U.S. Navy was engaged in numerous developments and tests related to technologies to strengthen their forces: radio transmission and communications between land and sea based vessels was crucial. At the time, a man named Jenkins had successfully transferred television waves to film and another had made possible signals printed onto thin strips of paper. The future was crafting many developments. Jenkins system was essentially a crude, early scanning disc system. The Navy wanted to test the plausibility of receiving signals from Mars.
In August of 1924 the red planet was at its closest position to earth (35,000,000 miles) and a test was planned. Dr. David Todd was head of the "Jenkins Radio-Camera Test" of August 23, 1924. The government shut down all radios of that date. Not all locations reported in as planned but from British Columbia came a report of a mysterious series of coded signals. They were four dashes repeated numerous times.
The real results came from the Naval Observatory, site of the experiments, where they recorded along an extremely long roll of thin photographic film strip. Down one edge were a series of dots and dashes. Along the other were clusters of dots that appeared to form crude human like faces. The New York Times on August 28 reported on the event. What really excited the scientists, however, were not the dot-matrix like faces but the chronological association they identified.
There was some regularity in the events from 1899 to 1924. It seemed to be reflected in events occurring a year or two after keeping events in a 21 year range of time. The question raised was there something "out there" receiving the messages sent and attempted to return communications?
Add 21 more years to 1924 and you arrive at 1946 and the mysterious lights seen over the area of Scandinavia. Add, one more year (matching the sending of the Marconi signal in 1901) you end up in 1947....the year most people assume birthed the entire UFO/UAP issue.
Since historical records indicate there was activity in 1946 and earlier in 1947 the regularity seems pretty solid. Add 21 more years to the 1946-1947 window and you end up in the 1965-1968 window of increasing activity. Adding 21 more years and we reach the 2010 window. Adding 21 more years and we face another window in 2031...eight years.
In 2020 there was a decided upswing in attitudes, recognition of unknowns and governments acknowledging the need to seriously study the once ridiculed topic.
Is there a deadline approaching?
What key events occurred in the windows of 1968, 2010 that might provide further insight?
Is there....somewhere
...a clock ticking?
[Discover some fascinating under reported early cases by one of the journalists of the time. Flying Saucers - Serious Business by Frank Edwards (Bantam, 1965). He uncovered and shared numerous stories and facts no one else did. See pages 73f for more on some early research in to the possibility of alien life that went unreported or was ignored.]