posted on Dec, 20 2011 @ 08:06 PM
Living underground makes sense for a lot of reasons. No cooling or heating is required, and if it does, not alot of energy would be needed. As far as
ET being underground, well think of Mars. Mars already has dormant volcanic magma tubes which go deep enough to avoid the radiation exposure on its
As far as here on Earth?
Well military defense bunkers such as Denver Airport exist. And their sole purpose is when the bombs start dropping, the people inside survive. So
going underground makes sense.