Science doesn't claim to have all of the answers. Science is the eternal quest for truth. What is unknown becomes known over time.
Besides, physics in our universe are a property dictated by the circumstances present at the inception of the current universe, and I would not supposed that the laws of physics here would be the same in another universe with different circumstances.
What do you mean by "known". How do particles moving along paths governed by the laws of physics "know" anything?