Modern CPR technique began development in 1958 as an impromptu way of keeping a dog who had suffered a heart attack alive long enough to be defibrillated. Many were initially skeptical that it would work on a person; it was not attempted on a human until more than a year later.

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How Radioactive Isotopes are Used in Medicine

Radioactive isotopes, or radioisotopes, are species of chemical elements that are produced through the natural decay of atoms. Exposure to radiation generally is considered harmful to the human body, but radioisotopes are highly valuable in medicine, particularly in the diagnosis and treatment of