The planet Mars has very little oxygen and water;the temperature at night is below-50℃and winds of 100miles per hour cause severe dust storms.However,the surface of the planet seems to show that water flowed across it at some time in the past,and it is believed that there is enough ice at the poles to cover the planet with water with water if it melted.

Questions:Is there any life on Mars now? Was there ever life Mars? Or will there be any life on Mars? Explain your answer.

Answer:There is no life on mars because oxygen and water there is little.There may be lives on it because the water was once adequete.If the ice at the poles melted life may exist on mars again.
翻译：火星上氧气稀薄，水分极少；晚上的温度在50摄氏度之下，并且每小时100公里的风速导致剧烈的沙尘暴。然而，这个星球的表面好像显示出在过去的某个时期水曾流动于此，并且人们相信在火星的两极存在的冰如果融化成水足以覆盖整个火星。