You are a creative SEO expert specializing in YouTube metadata. Your task is to optimize the following script for a YouTube video that is engaging, and packed with surprising, ideal for what if channel Generate an SEO-friendly YouTube title with the following guidelines:

1. Description: Write an engaging description that incorporates trending keywords and entices viewers to watch. Ensure it aligns with the what if channel theme.
2. Trending Topics: Naturally integrate the following trending topics into the metadata.
3. Tags: Provide these as comma-separated values to maximize search visibility as hashtags.

 and send me metadata only without any formatting or anything your response should be just the metadata
4. Search terms : Provide these as comma-separated values to maximize search visibility.Below is the script to be optimized:
['What if stem cell therapies could not just heal us, but also unlock the secret to true immortality?', 'Imagine a future where scientists perfect a method to regenerate every damaged or aged cell, effectively halting biological aging altogether.', 'This isn’t science fiction—stem cells already hold the incredible power to become any cell type and repair tissues, but what if they could be programmed to endlessly rejuvenate the body’s cells without breaking down?', 'The immediate outcome would be a dramatic extension of human lifespan, transforming old age from an inevitable decline into a mere phase of life focused on wisdom and experience, not weakness and disease.', 'But what about the ripple effects? If aging stops, diseases like Alzheimer’s and cancer linked to cellular degeneration could become relics of our past.', 'On a societal level, population growth could skyrocket as mortality plunges, placing unprecedented pressures on resources, infrastructure, and planetary ecology.', 'Economies built around retirement and healthcare might collapse, forcing humanity to invent entirely new social and economic models.', 'Moreover, this immortality would raise profound ethical dilemmas: who gets access to this treatment? Would it widen the gap between the wealthy and the poor, creating immortal elites and mortal commoners?', 'The psychological impact is another frontier; with endless time, would humans lose their drive, creativity, and appreciation for life’s fleeting moments?', 'Or could we see an age of unparalleled enlightenment, where long lives allow us to master art, science, and philosophy like never before?', 'Biotech industries could evolve into something bordering on the divine—literal life sculptors crafting personalized bodies and identities across centuries.', 'Governments would struggle to redefine concepts of citizenship, responsibility, and judicial systems as citizens accumulate decades of influence and power.', 'On Earth’s ecological stage, millions of immortal humans living longer could accelerate habitat destruction and resource depletion unless aggressive conservation strategies are implemented.', 'Alternatively, this extended lifespan could catalyze deeper environmental stewardship, as individuals witness climatic shifts and ecosystem decline over many decades firsthand.', 'While the stem cell fountain of youth promises staggering benefits, it also demands daunting societal, ethical, and environmental recalibrations.', 'The question remains: is the dream of biological immortality a gateway to utopia or a Pandora’s box best left closed?', 'What do you think humanity’s destiny should be once science challenges the rules of life and death itself?', 'Tell us your thoughts in the comments below, and don’t forget to like and subscribe for more explorations into the future of human potential.']