“So someday in the near future hopefully rather than having a foot or a leg amputated we'll just give you an injection of the cells and restore the blood flow. We've also created entire tubes of red blood cells from scratch in the laboratory. So there are a lot of exciting things in the pipeline.”
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Amazingly when you add life and consciousness to the equation you can actually explain some of the biggest puzzles of science.
In fact when you combine stem cell technology with the technology known as tissue engineering you can actually grow up entire organs, so as you suggest that sometime in the future you get in an auto accident and lose your kidney, we'd simply take a few skin cells and grow you up a new kidney. In fact this has already been done.
We have failed to protect science against speculative extensions of nature, continuing to assign physical and mathematical properties to hypothetical entities beyond what is observable in nature.
Modern science cannot explain why the laws of physics are exactly balanced for animal life to exist.