Suppose there is a murder in a place now, and the light at that time will spread from all directions at the speed of light in a place. If you are faster than the speed of light, then you can always catch up with the light at that moment, that is, you can see what happened at that time.
But speed is related to quality.
According to Einstein's theory of relativity: m ` = m/(1-(v/c))1/2.
When the speed increases, the mass of the object will increase, but the macroscopic object is very small compared with the speed of light (3x10 8m/s/s), so we can't feel the change of the mass of the object. It can be seen from the formula, but when the speed of an object reaches the speed of light, its mass will be infinite (because the denominator is 0), so it is impossible for an object to reach the speed of light, and it can only be infinitely close to the speed of light.
So scientists made other speculations. Since we can't reach the speed of light to restore the past light, we can use the distortion of space to get to another space in an instant, so that we can see the previous light. So the wormhole theory came into being. . .
This is how science develops. . It's still hard to go back to the past. . It is up to our younger generation to study hard and explore. . .
-above, only personal opinion.