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The concept of ether was disproved in the late 19th century by the Michelson and Morely. It was one of the first thing they covered in that set of lectures because for some reason there are people who won't let go of the concept of ether.
The most supportive, real-world and relatable piece evidence that I can think of regarding relativity is that timing on GPS satellites has to be adjusted using relativity in order for them to stay accurate.
There are many more but to list them all would take up to much time and space.
Relativity contradicts Newton's Laws of Motion but they are still valid in most situations and I wouldn't send my child to a school that didn't teach them.
Relativity has recently been contested by scientists that measured the speed of some sub-atomic particles to be greater than the speed of light.
My point is that if you are thinking of science as body of facts then you really don't understand what science is in first place.
Observation, hypothesis, testing, measurement, interpretation, Conclusion. And...repeat
Every scientific theory is just waiting to be disproved.