Yes, an attack for water, Comet juice, what have you. Its' at least 90% of your body mass and may be a determining factor, should we get off of our greedy asses and look to the stars for a moment, of evacuating a dying planet in the event of some cataclysmic apocalypse, which, let's face it, we are overdue for through fault of our own making if nothing else, history channel not withstanding.