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DrunkenlySober t1_j73595u wrote

Reply to comment by NaloraLaurel in Incredible footage of this Tsunami is mind blowing by HurricaneHarvey7

The scariest disasters are known as mass extinction events. There have been 5 in the history of the earth. These disasters add numerous species to the extinction list

The last one was 66 million years ago and killed 75% of all species. The gap between these events has been as short as 20 million years and as long as 130 million years

The scariest of these events is an asteroid collision. Hard to detect, can happen out of nowhere, and absolutely devastates the earth including very extended environment changes

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NaloraLaurel t1_j738ek9 wrote

5 that we know of 😂 I’m willing to bet catastrophic floods are far FAR more common than we think. I mean just look at the clear signs of water erosion that blasted through Mesopotamia and the top portion of the continent. Clearly visible on google earth.

I think how little we know about the rock we live on and it’s history is the scariest thing to me.

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