Some animals have a form of suspended animation– hybernation. Two key aspects of hybernation are decrease in metabolic rate and reduction in core body temperature. For humans, a hypometabolic state might have great medical benefit for a variety of conditions, including ischemia and reperfusion injury, pyrexia, and other trauma. Suspended animation–like states may also be useful in surgical situations when delay is sensible for surgical teams, but would be dangerous for the patient.