This is an image of the surface of Mars.
Click on image for full size
NASA
Can there be Life in the Environment of Mars?
In spite of the fact that Mars has an atmosphere, the environment of Mars seems unfriendly toward
life as we know it on earth.
Mars has little atmosphere . This means that the temperature above the surface is cold. With little atmosphere, there is only a little pressure, which sophisticated life forms such as humans need to keep blood from boiling. (Remember what happened to the characters of the movie "Total Recall" when they encountered the surface of Mars)!
We know, however, that there are life forms on earth which can survive in very harsh environments.
In the past, liquid water flowed on the surface of Mars. With a liquid water habitat and a thicker atmosphere, life may have once thrived. More exploration of Mars is needed to determine if life was once present there.
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