Speed of light. There is a dirty little secret for you.
Evidence accumulated over 150 years indicates the speed of light is slowing down.
So what did the “scientists” do?
The re-defined the speed of light.
They took something that was previously thought to be a constant. Something that did not change. And then they CHANGED its definition.
Similar to trying to get superconductivity to work at room temperature, you lower room temperature to -70 degrees, voila! Superconductivity.