text: To date, no signs of Martian life, either present or past, have been found. But we shouldn't give up, as this is not an ultimate answer, it's only what the past measurements and observation told us. Further inquire and more accurate experiments are in preparation by the various space agencies, using robotic probes.\nFor instance, the European Space Agency is preparing two Martian probes: ExoMars and Mars Sample Return.\nExoMars foresees a rover equipped with many experiments for studying the biological features of the Martian environment.\nMars Sample Return will collect soil samples to be returned to Earth for even more accurate laboratory analysis.\nIn both cases, the idea is that Martian microorganisms or some traces of them (if they exist) may have escaped the previous observations.\nYou can find more details at the following links.