Mars science laboratory - wikipedia, free encyclopedia, Mars science laboratory (msl) is a robotic space probe mission to mars launched by nasa on november 26, 2011, which successfully landed curiosity, a mars rover, in. Mars - wikipedia, free encyclopedia, Mars is the fourth planet from the sun and the second smallest planet in the solar system, after mercury. named after the roman god of war, it is often described as. Old mars rover finds signs life, Old mars rover finds new signs of life. the opportunity rover, still chugging across mars after 10 years, has found that the planet might have been.