They sent robots to look for it, so far they've found no signs of life.
Because Mars is the closest planet to Earth
Scientists would like to know if there is water on mars because if it is there the planet has the possibility of sustaining life.
Scientists are hoping to get life on MArs.
Since life as we know it requires water, scienctists hypothesize that Mars may have once had the conditions needed for life to exist.
Mars has two moons that scientists know of today.
because scientists researched it and found out there is seasons on mars
Yes, demonstrably the planet Earth has life. Scientists are currently looking for life on Mars (no proof of life recognized there yet) and are speculation that some extrasolar planets may be in the Goldilocks zone for life.
No, but scientists believe that there could have once been life on Mars.
So far, scientists, who are still hoping, are turning up empty handed on the "life on Mars" subject. There is currently no evidence of life on Mars.
perhaps zero
Earth is similar to Mars because we know that life is possible on earth and some scientists believe that life is also possible in mars because it has some things which is also present in Earth and is needed for all living things.
As of yet, none that is convincing, only tantalizing. The #1 question astronomers and other scientists would like to know today is: "Was there ever life on Mars?" Future robotic missions, and inevitably, men landing on Mars, may answer that question.