Mars, Rosetta, and life “emergence”: genericities and contingencies

The solar system space exploration, coupled to the characterization of extrasolar stellar systems, reveals an extraordinary and unexpected diversity of evolutionary pathways. What are their drivers? What is the relative contribution of genericity and contingency in the processes responsible for these evolutions? Based primarily on the (past, present and future) space exploration of Mars and comets, our discussion will focus on the changes of paradigms presently operating, with a special address to the unicity of Earth and life.