Terra e Marte: una comune origine biologica?

Earth and Mars could conceal a common biological origin in their ancient past. Really, 4.1 thousand millions of years ago, when the first microbial cells appeared on Earth, a potential biosphere could be arised, also, on the "red planet". The new characterization, on Martian surface, of volcanic basins, once flooded, and the exciting discovery of hydrothermal deposits on Mars, suggest a possible analogy with Earth where seafloor hydrothermal vents, located close to the Mid-Atlantic ridge and in some hot-spots of Mediterranean floor, highlight a marked likelihood between the two planets. Then, life could be originated in the same time not only on Earth, but also on Mars.