Read the below passage on Mars and use the information to write a composition about the possibility of life on the planet .
There has long been speculation concerning about the possibility of life and liquid water on Mars . However , the planet's thin atmosphere prevents water from accumulating for any time over significant portions of the planet . Some evidences of the planet's surface suggest the presence of liquid water at some point in history , but scientists think this water would be too salty or acidic to support life as we know it . Futhermore , fierce solar winds and poor heat transfer across its surface would make sustained life virtually impossible . There is compelling evidence , however , that Mars was once much more habitable to life than it is today .
Start with :
I think that there is no life on Mars . Firstly .......
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