As in: from the surface of Earth to the surface of Mars? If yes, how?
Allan Hills 84001 famously caused some controversy in 1996 when scientist believed it contained evidence for life on Mars, which ended in an announcement from the President. In the end the consensus seems to be that there was no evidence for life.
[1] https://en.wikipedia.org/wiki/Northwest_Africa_7034 [2] https://en.wikipedia.org/wiki/Allan_Hills_84001