Recently, scientists have begun to understand the benefit of redundancy in biological systems. By having multiple pathways and components that can perform the same task, redundancy allows systems to remain functional even if one part of the system fails. This is particularly useful for critical systems, like those found in the human body, as it allows for the body to continue to operate even if something goes wrong. This newfound understanding of redundancy can be used to develop new treatments and therapies that can help keep our bodies functioning at their best.

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source: Phys.org