Do Microscopic Immortals Actually Exist?

From Journey to the Microcosmos.

Are you immortal if you never age? Defying death is not as clear-cut as it might initially seem. What we define as immortality depends a bit on what you think it means to die.

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SOURCES:
https://www.livescience.com/57985-tardigrade-facts.html
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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4133289/
https://science.sciencemag.org/content/365/6451/eaav9314
https://www.pnas.org/content/109/48/19697
https://biology.ucdavis.edu/news/mapping-cells-immortal-regenerating-hydra
https://www.sciencedirect.com/science/article/abs/pii/0047637486900448
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC43283/
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