@Chris C
Yes we can. Physical & chemical laws operate the same in London as in Sydney, in Earth orbit, and on the moon. Otherwise none of our lunar astronauts would have made it home.
Any astronomer will tell you that spectral analysis of light from stars can be used to determine their size, temperature, composition and the nature of the fusion reactions occurring in them - none of which would work if the physical laws at the location of the star did not match the physical laws we find on earth.
So how is it that you think that Mars will be any different to the rest of the universe? Occams razor alone says that the simplest option - that there will be no difference - is probably the correct one.
Oh, and one more thing.... hahahahahHAHAHAHAHAHAHAhahahahahah...
Biting the hand that feeds IT
