Is science a Dhamma or Sankhara or both?

I am still confused about the meaning of Dhammas. Here I take the example of science. Science has many truths. Science explains the reality in its own ways. My question is: Can we consider Science a Dhamma? If yes, then why is it a Dhamma? If not, then is science a Sankhara? Is yes, then is it Anicca? Or Is Science both a Sankhara and Dhamma?