scientists believe that mars once had a vast ocean
they are now looking for water with space probes
one mission in 2008 found ice on mars but not liquid water
nasas curiosity rover landed on mars in 2012 equipped with sophisticated instruments
its objective was to study samples of rocks and find out if they contain organic molecules which are signs of life
new technologies will enable scientists to explore mars in new ways
and who knows
maybe in your lifetime the first humans might step on mars