Are you kidding? Are you saying that the claims that science makes do not have to be proven?
Also, where is the reference “that says that which makes space travels at the speed of light“?
I think you have a misunderstanding of what science is. Religion is based on beliefs, science is based on proven observable phenomena and testing. Scientists do not just state a belief they have and leave it at that, unproven or unexamined. Do some research on the job of science, and look up these terms: Theory, Scientific Law, Hypothesis, Physics, Scientific method. You can find all of these terms on the internet.
You need to get a basic understanding of how science works.
Thank You.
Steve