Sloth
Individual sloths in the wild typically survive 10-20 years, with captive specimens occasionally reaching 30-40 years. However, the genus has demonstrated remarkable evolutionary persistence, with sloth ancestors appearing in the fossil record approximately 64 million years ago. Ground sloths the size of elephants once roamed the Americas.
This taxonomic longevity speaks to a survival strategy of extraordinary effectiveness. While flashier species have risen and fallen, the sloth has simply hung there, waiting, enduring.
Thor
Thor possesses what theologians term conditional immortality—ageless within Asgardian parameters yet ultimately subject to the prophesied destruction of Ragnarok. By Norse reckoning, he has existed since before recorded human history, suggesting an individual lifespan measured in millennia.
In terms of cultural persistence, Thor has demonstrated remarkable staying power, transitioning from Viking worship through medieval demonisation to contemporary superhero apotheosis. His name remains embedded in our weekly calendar, a form of immortality few deities achieve.