Perhaps the best motivation for going to Mars is political. It is obvious that no single nation currently has either the will or the resources to do it alone but a consortium of nations and space agencies could achieve it within 20 years.
I can work myself up into a fearful paralyzing state of mind that can last for days weeks even months where I feel mad totally isolated and alone overwhelmed and completely out of control.
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Both my husband and I give a lot of ourselves in what we do because that is our public lives but in my private life I have an intrinsic right to be left alone.