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Q&A

Catastrophic event from space/earth that humanity are able to see it coming

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Assuming current technology, is there any catastrophic event from space/earth that humanity are able to see/detect/calculated it coming. (Would prefer a space event but earth ones are welcomed)

This event should be able to wipe out at least 90% of living things.

  1. We are able to detect this event 1 year before it strikes

OR

  1. We are able to detect this event 5 year before it strikes
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This post was sourced from https://worldbuilding.stackexchange.com/q/33936. It is licensed under CC BY-SA 3.0.

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