Are the laws of physics the same of our earth the same as other planets in our universe?

Hello i was thinking and i may already know the answer but are the laws of physics the same on other planets in our solar system as our earth. I would think not since the gravity, heat, magnatational pull, and make up of other planets are different than our own. Lets take mars it may have different matirials in the land that could possibly allow us to find a different way of propelling our cars etc. If you say somehow made an artificial enviroment on mars and studied mars in depth as a human on the soil not a mars rover it would be like studying the world all over again. There have been microorganisms found on mars so this dismises all critiqes that say we are the only living beings in our solar system because there they are on mars they may not be our view of aliens but they are still microorganisms. Okay back to the point If the laws of physics are different from our, im not just saying physics but everything than our planets are the second step in furthering our selve in knowledge and wisdom of course the first step is exploring our oceans on our own planet. This is my opinion etc etc and i wonder what everyone else thinks. Thanks =]