Besides just researching science and technology, the Germans also has a strong sense of study with the Ahnenerbe traveling to distant parts of globe in search of new discoveries. The Ahnenerbe, was a bizarre organization, with research conceptualizing lunar travel, 30 years before Apollo. The Antarctic and South America were regular destinations for Ahenerbe. With multiple high-ranking Germans missing after the end of the war, multiple German U-boats were intercepted by the allies, heading down to South America, carrying more men, then usually needed.
It's might seem impossible that the Germans escaped, but you need to realize how massive their U-boat fleet is, plus all of the other technologies being developed at the time makes this theory all more possible. While the nazi are famed for the advance weapons technologies, they also were very advance logistic technologies as well. Starting with the autobahn system, all the way through known and document productions of rocketry and jet planes, with other hypothetical designs collected as well. A country the size of Texas, had 3 of the largest empires of the time. Since being outnumber came with being out gunned, the Nazis could not defend their European hoards, causing a select few to be sent off into a secret retreat. If they couldn't protect their land, they figured they would try to at least save their own people and go from there.
Operation High Jump two years later is a perfect example of how well this plan worked, along with demonstrating how advance the nazis undeveloped technology had come. The cold war that followed, between two countries run by the same people, would just be a facade to convince the public to develop technologies, for a war they would never told about.
Now, they are everywhere today. They are in space, in the depths of our oceans and flying around our atmosphere.
While we were developing rocketry for space exploration and warfare during the cold war, the nazis too were taking their technology and wisdom and venturing off into the solar system, to the point of establishing a space colony expanding the course of planets. With access to new planets, asteroids, and different lunar bodies came access to new materials, which lead to new sciences and studies, ultimately leading to ever better technology than before. This leads to a feedback loop of an exponential growth in technology, the likes of which people on earth can't even fathom. Not only is this technology being developed, with no stop in sight, it's also being tested regularly against space and other military targets on Earth. That's why UFO sightings around military hardware failure are so common.
Luckily, we have NASA, but don't you ever wonder why they make so many mistakes, like losing all the Apollo films, or going too heavy on photoshop. It's that there are settlers on the moon and mars, that they don't want you to know about, so they produce data about space to keep the truth hidden. That's why so much of the data the public gets from NASA seems untrustworthy. The governments of the world want to do everything they can to stay in control, and NASA gives them an opportunity to not only perpetuate lies to the public, but to aid in this wicked goal.
Anyone who plays close enough attention will recognize, the repetitive sketchy behavior of our militaries and space agencies, but when you understand how World War Two ended and where these UFO come from, the quasi behavior of the governments makes all the more scenes. It is for your own good though.