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I n the weightlessness of space, blobs of water settled around Luca Parmitano’s <a href="https://www.nbcnews.com/science/nasa-cuts-spacewalk-short-due-water-leak-helmet-6C10645572">eyes, nose, and mouth</a>. <a href="https://www.nbcnews.com/mach/science/saving-spaceman-drowning-ncna784431">His cooling system had sprung a leak while on a spacewalk</a> and he needed to remove his helmet soon or else he would drown. He signaled for help from his teammate Karen Nyberg.