As cited above, there is no evidence that life ever existed on Mars. Although there is evidence of the existence of water, which most scientists agree is necessary for the development of life, no one knows how long and in what quantities that water existed in liquid form. Judging by life on earth, life needs a long time to evolve in the presence of liquid water, and that time may not have been available on Mars.
One can assume that man will eventually set up bases on Mars. But self-contained and self-sustainable bases, as well as space suits, will be necessary, as the Martian atmosphere is generally very cold and very thin (1/100 that of Earth). Here are some specifics:
Mars' temperature ranges from -220º F (-140 ºC) in the winters to to almost 70 ºF (20 ºC) in the summers. The average recorded temperature on Mars is -63 °C (-81°F). All in all, Mars is pretty darned cold.
The composition of the atmosphere is:
Carbon Dioxide (CO2): 95.32%, Nitrogen (N2): 2.7%, Argon (Ar): 1.6%, Oxygen (O2): 0.13%, Water (H2O): 0.03%, Neon (Ne): 0.00025 %
Nowhere near enough oxygen to breathe in and lots of CO2, which we normally breathe out.
If you mean little green men, well, no. However, discoveries have been made on Martian rocks that strongly indicate some form of primitive life. The analysis found certain organic compounds which most likely came from biological processes, as well as evidence that primitive bacteria once existed on the planet as well. A key component that scientists look for is the existence of liquid water, and it's fairly clear that Mars possessed that before its atmospheric composition altered in the distant past. It may still possess some beneath its surface, so there may still be some life as we know it currently in existence.
Most likely humanity will be able to live on Mars, not as like we live on Earth, of course, but once certain technologies come to fruition and the problem of getting people and materials there is solved, the day will come when permanent colonies can be established.
None of these questions has a clear answer because we are not able to study Mars as thoroughly as would be needed to answer them.
No life has been found on Mars so as far as we know, there is no life there. This does not, of course, mean there is none. Recent missions to Mars have, scientists believe, shown that there is water on Mars, though it is not often (if ever) liquid. There are also indications of methane, which is generally produced by life
Was there ever life? Again, no proof that there ever was. There is a meteorite, however, that some scientists believe shows that there was once life on Mars.
No there is no life on Mars. But scientists say that once upon a time there was life in Mars. They have found many signs that was found by the Mars rover. Yes! There is very much possibilities that we can live on Mars. One day there will be the biggest hill station on Olympus Mons.
We can live on Mars by exploding many carbon dioxide bombs. And during this period we can grow plants and the plants can give us oxygen to survive.
Its so simple why the scientists are not ready for that.
Never have a hopeless situation. Hope and curiosity has no end.America existed long before we knew about it. There is a curiosity for man to know about mars since it is comparatively near and the planet has many things friendly to life.
Mars has atmosphere, it has oxygen, nytrogen, argon, water vapour , carbon dioxide. It has an atmosphere pressure and temperature not as extreme as other more distant or nearer planets to sun.Now there are tests going on whether any organism , at least bacteria could survive in simuated conditions as on mars. Efforts and inventions are in process to know more about mars and its life friendliness. Let us hope for the best.