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Therefore, please stop using phrases such as, “Extinction is the fate of all species”. True, maybe 99.99% of all species that have ever existed are now extinct, but that is a frequency, not a law. Extinction results from a failure to acclimate on a short timescale, or to adapt on a longer, evolutionary timescales. The apparent extinction of species on the long run is the result of those failures, and is neither a requirement nor a certainty.
In biology and ecology, extinction is the ceasing of existence of a species or group of taxa. The moment of extinction is generally considered to be the death of the last individual of that species. Extinction is usually a natural phenomenon; it is estimated that more than 99.9% of all species that have ever lived are now extinct.