Indications of life on Mars:

>>There is water on Mars; there are two icecaps on the two poles; with variation in winter and summer, in addition to the ice present on the tops of the high mountains of Mars, like that on Earth.
>>There are clouds moved by the wind, like that on Earth.
>>Its atmosphere is clear, not like that of Venus (turbid and full of smoke), and not like Mercury that lost most of its atmosphere.
>> The distribution of the temperature on the surface of Mars is somewhat similar to that on Earth with its variation according to the particular region of the planet, with succession of day and night.

Some comments:
>> They have been misguided as to the proper place for their search: they searched in the desert region, and in some other desolate region. While if they search in the temperate regions, they may find people, animals and plants.
>> In case there are two frozen poles, where does the large amount of snow, which melts in spring and summer time, go? There must be seas and rivers.
>> This large planet with all these features, and with its two moons, is certainly full of living beings: people, (and genies), animals and plants, and is suitable for living of the people of Earth (may be with some modifications.)

http://www.quran-ayat.com/universe/new_page_2.htm#The_Journey_to_Mars_Is_Successful_

http://www.quran-ayat.com/universe/n...ation_to_Mars_