Submitted by universetoday8934 in science
Lava tubes and caves could end up being used as bases during Mars exploration. This one in Hephaestus Fossae could be a good place to start.
Submitted by universetoday8934 in science
Lava tubes and caves could end up being used as bases during Mars exploration. This one in Hephaestus Fossae could be a good place to start.