Is there a medication that helps prolong life

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Across
  1. 3. An adult male human being.
  2. 5. The end of a life of a person or organism
  3. 6. The most common eye color
  4. 7. A young human being below the age of puberty
Down
  1. 1. An adult female human being.
  2. 2. the scientific study of genes and heredity—of how certain qualities or traits are passed from parents to offspring as a result of changes in DNA sequence.
  3. 4. Human beings in general