The main reason we explore Mars is to find out if life ever existed there. But we're looking in the wrong places.
When searching for something, the first step is to look in the most likely location. That doesn't always work. Things sometimes show up in unexpected corners. But most of the time the milk is in the fridge, the phone is on the table, and the keys are by the door. Why would searching for life on Mars be any different?
The main reason we explore Mars is to determine if life ever arose on the planet. We have tried for centuries, starting with telescopes and lately with satellites, landers and rovers. We have searched for it directly (the Viking mission) and indirectly (every other Mars mission). No luck so far. Some think life has never been there. Others think it was there in the past but is now gone. Many think why bother, but that's a whole different story. I think we are looking in the wrong places. Here is why.
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