3 ms·

I'm not a math wizard but going by that pattern it seems the periods are getting shorter. I tried to find a sequence https://www.wolframalpha.com/input/?i=415,

I'm not a math wizard but going by that pattern it seems the periods are getting shorter. I tried to find a sequence https://www.wolframalpha.com/input/?i=415,+322,+300,+145,+33,+.. https://www.wolframalpha.com/input/?i=415,+322,+300,+145,+33....

marcosdumay 10y ago
My bet is that is because of observation biases. We don't know a lot about distant past, and may have lost some events that we'd call great extinctions if they were recent.
mrec 10y ago
The periods (intervals between events) there would be [93, 22, 155, 112] My. That doesn't look like they're getting shorter.
- swamp40 10y ago
  But they are getting closer! :)