The question as to whether there is life on Mars that is related to life on Earth has now been very muddied, because we now know, from Mars meteorites that have made it to Earth, that there's material that can be exchanged between those two planets.
A questão de saber se há vida em Marte ligada com a vida na Terra está ainda muito confusa. Sabemos hoje a partir dos meteoritos de Marte que chegaram a Terra que há material que pode ser trocado entre estes dois planetas.