Science does not point to an exact expiration date or a specific number of years left for life on Earth, as complex biological life is expected to endure for hundreds of millions of years under normal planetary evolution. However, long-term astrophysical models project that as the Sun gradually ages and increases in luminosity over the next billion years, solar radiation will eventually trigger runaway greenhouse effects, evaporating Earth's oceans and ending complex multi-cellular life. Furthermore, shorter-term habitability timelines are continuously impacted by natural geological shifts, cosmic occurrences, and anthropogenic environmental challenges that humanity actively works to mitigate.
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