Scientists reported that pig kidneys cooled to about -150°C and stored for months can be rewarmed and function again, with urine production after transplantation into pigs. The preprint describes a survival-tested pathway toward longer-term organ banking, though long-term performance remains unproven and peer review has not occurred. The result targets two major transplant bottlenecks: short preservation windows and the operational challenge of moving organs fast enough for recipients. Cryopreservation advances could eventually reduce the dependence on constant supply and time-critical logistics.