Physics is always advancing.
In 1900 it was scientific consensus that powered flight was hundreds, if not thousands of years in the future.
In 1903 we flew in what was basically a powered kite.
In 1943 we were flying across the oceans, shooting rockets at foreign countries, and closing in on breaking the sound barrier.
In 1983 we were flying regularly into space, had hundreds of satellites circling the earth and a supersonic commercial aircraft.
In 2023 we were not that much ahead of 1983. What happened?
What happened was physics advanced. We have capabilities that are not public knowledge. Why? Because they are disruptive, they are dangerous, and they are being withheld to be used in the event of an existential crisis.
After splitting the atom, the next advances in physics are clear...quantum mechanics, fusion, zero point energy, and anti-gravity. Any of these technologies falling into the wrong hands could be devastating. At the least they would disrupt the world economy. It was determined long ago that scientific advancement would only happen with the approval of those in charge...and those people are not necessarily our elected leaders.
My uncle, who was career Air Force intelligence, who went on to work for the DOE, and ended his career as head of security for Los Alamos and Sandia Labs said to me once:
“You like science fiction? Imagine what you think we have. Now add 100 years. Now you’re getting close.”
Ultimate physics is Sun.
There are no objects in entire universe more powerful than Sund.
Suns work with nuclear fusion.
Humans have not been able to achieve sustained fusion.
After 40 years of trying hard.
Everything has limits.
Space travel is limited because of distance.
It takes 9 minutes for light to travel from our sun to earth.
The next nearest sun takes months for light to travel to earth
That is the problem.
Universe is spread out sparsely.
Spacecraft needs sun light to generate power.
There is no sunlight between our sun and next nearest sun.
There is unimaginable vast cold dark space between adjacent suns.
Stop thinking science fiction is real.