Is there a point in the Mars explorations?

i have to agree some what only because scientists have said we don't know everything about earth yet. We lack the equitment they say. So I agree woundering why open a whole other subject of questions when we have questions at home to be answered. And i am inclined to say that these ones matter alittle more too. Unless the solution to global warming, poverty, or all out illness is on Mars what the hell is the point? An extremely rich man's hobbie sort of speak.