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Date when lifespan increases >0.75 yrs/yr

Question

Death is, perhaps, the last great enemy to be felled. All living things, including all ≈100 billion humans, either have died or will die. All the while, technology and medicine have been improving, life expectancies and infant mortality have made massive gains in the past 100 years, and infectious diseases (less one glaring example) have been decimated. Some may not find it so far-fetched to try to take on death and aging itself.

However, this presents a unique and extremely difficult problem to the modern medical field. Human bodies are made of trillions of cells, each either being replaced via mitosis that, over time, accumulates errors and mutations, or slowly decaying and receiving damage from the environment. Those who would try to bring the end of aging face the task of keeping trillions of cells and 600 AU of DNA per person undamaged and complete... across a population of billions.

Attempting immortality, even without somehow preventing death via accident or violence, is an even less likely goal.

Given the monumental range of possible answers, though, I don't expect this question to resolve at any point in Metaculus's existence. Again, it's more of a read on how likely people think it is that immortality is possible.

When will biological lifespans increase faster than 0.75 years per year?

This question resolves on the date which the oldest living person is 30 years older than any previous record for the oldest person in the last 40 years. In other words, when the rate of "oldest person to have lived" increases at a rate greater than 0.75 years per year, over a 40 year period.

For example, suppose on Dec 10, 2060, someone reaches the age of 152 years and 165 days. this would be 30 years more than the record held by Jeanne Calment on Dec 10, 2020. the resolution date would be Dec 10, 2060.

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