we can use tissue samples and genetic engineering to grow organ cells, but the genes that holds them in shape cannot yet be recreated. In theory, when this i possible, a new brain say, would mean effectively an 80 year old new-born child as the parts of your brain that retain information and memory cannot be salvaged from the original. The same applies for hearts and livers etc, we can grow the cells, but not hold them in the correct shape. However, once these issues are resolved, immortality will be possible although the ethical issues behind this will out weigh the benifits on medical science. personally i agree, the same as cloning really, it's unnatural and unintended by whatever or whoever created all of this.
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