Scientists study salamanders and their ability to regenerate lost legs and tails. What additional information is essential for scientists to understand in order to apply this ability to humans who have lost limbs?

To apply salamanders’ regenerative ability to humans, scientists need to identify which genes control the process. They can then investigate whether those genes or similar ones could be used to trigger regeneration in humans. Knowing which parts are most often lost or how quickly they regrow does not explain what causes regeneration.

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