The absence of persistant liquid water and the punishingly hard UV make the surface a poor biome for life that shares our penchant for moisture and amino acids.
One wouldn't look in the least likely location, would one?
The absence of persistant liquid water and the punishingly hard UV make the surface a poor biome for life that shares our penchant for moisture and amino acids.
One wouldn't look in the least likely location, would one?
It is based on assumption that there was surface life in past. The condition was much more favorable than now. But presently the surface is very dry desert and without suitable atmosphere. If life ever existed on the surface, the only way to survive was moving under the surface.