how do we determine a species has gone extinct? You’re telling me you looked EVERYWHERE?
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It’s when there haven’t been any documented (or reasonably probable) sightings in a certain amount of time. At that point we reach a consensus conclusion that the species in question has gone extinct.
We can’t realistically “look everywhere” and every once in a while we do find something we *thought* was extinct that isn’t.
[https://www.treehugger.com/lazarus-species-extinct-animals-found-alive-4869279](https://www.treehugger.com/lazarus-species-extinct-animals-found-alive-4869279)
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