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We really, truly don't know anything, this particular interval in Earth's history isn't all that well preserved in the deep sea sediments we look at. It's hard to find suitable locations to do additional studies.
Found on CNN 3 years ago
It's possible something big happened, but whatever it was it was very rapid, the Earth system was able to correct The Earth system, but these big predators, these sharks that were living in the open ocean, must have been very susceptible to this rapid environmental change. But this is still just a hypothesis.
Found on CNN 3 years ago
We hope our study will spark interest in the rest of the scientific community to dig into this time interval, something really big must have happened because it impacted this really incredible group of organisms that have been around and frankly surviving major global change for the past 400 millions years.
Found on CNN 3 years ago
We stumbled into this thing completely by accident because what we saw was everything was pretty stable until about 20 million years when sharks dropped off in abundance by over 90 %, we found that sharks were doing incredibly well in the open ocean until this one moment in time when they virtually disappeared. We had no idea because no one had ever looked.
Found on CNN 3 years ago
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