भिडियो सहित हेर्नुहोस !
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Scientists who climbed to the summit of Everest and took samples of their own blood have shown that the human body can survive with much lower oxygen levels than was previously thought possible. They say the findings, based on blood taken at higher altitudes than ever before, will help doctors to treat patients in intensive care more effectively.
भिडियो सहित हेर्नुहोस !
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