Did there used to be life on Mars?

Answer 1

It is unknown. What has been proven though is that Mars used to have an atmosphere similar like earth (this is necessary to support life) also it is possible that mars has had liquid water before (pressure is needed to keep it in liquid form, and pressure comes from atmospheres), which is also necessary for life, as far as we know. (dried up riverbeds and channels are found on mars surface). in addition to the possible past liquid water, it is also a theory that mars has water still, wether in gas or solid form underneath the surface. A possible fossilized rock has been found as well. the rock has not been proven to be an actual fossil, but many people think it is fossilized bacteria, or in other words, life. If it IS bacteria, it is does not necessarily prove that it came from mars though. It could have come from earth due to the theory that mars and earth collided in early years, or come from earth from an impact big enough to send rock into space, then mars pulled it with its gravity. it is possible that it has come from another planet/object as well. Life on Mars is a big mystery. Mars is the planet most like earth, and the planet most likely to be able to support life as well, but it is still unproven that there has been life on mars, or even if there IS life on mars.

Answer 2

There is currently no conclusive evidence that there was ever life on Mars. However, some scientific studies suggest that Mars may have had conditions conducive to supporting microbial life in the past due to the presence of water and other necessary elements. Further exploration will be needed to determine if life ever existed on Mars.