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A gas proven deadly in chemical weapons could one day be used to put people into life-saving suspended animation.
Biochemist Mark Roth found that hydrogen sulfide in bonds in spots in bodies that would usually be occupied by oxygen, ostensibly becoming a sort of dimmer switch for metabolism.
"We did it with a mouse; this was cosmic," Roth said. "We found a way to do this with a mammal. All you had to do was put it in room temperature and it was no worse for the wear. Roth's lab has completed early phase human trials but hasn't actually tried the process in a person.