If anyone really wants to preserve a loved one or your own body for thousands of years without decomposition, Cryonics is the answer. This company based in Arizona called ALCOR freezes bodies with liquid nitrogen soon after death with hopes of reviving people who died from cancer or other disease in the future when technology allows for thawing out and curing the disease that killed them in the first place. Nanotechnology will have to be used I’m sure. Experiments have shown that rabbit livers have been frozen, thawed, and put back into living rabbits and they survived. Now science just needs new technology to be able to do this with a brain.