The article concludes ""We should see smaller fragments coming to Earth more frequently from the Oort cloud," Loeb said. "I hope that we can test the theory by having more data on long-period comets, get better statistics and perhaps see evidence for some fragments."
The article reported, "The chunk of space rock that killed the nonavian dinosaurs may have been a piece of a comet that Jupiter's gravity kicked onto a collision course with Earth. A new study suggests that the dinosaur-killing object was not an asteroid from between Jupiter and Mars, as is often hypothesized. Instead, the study authors argue, the impactor was a piece of a comet from the Oort cloud, a mass of icy bodies that surrounds the outer edges of the solar system."
My observation. Impressive how an object in the Oort Cloud can remain stable for billions or millions of years and then later hit Earth 66 million years ago to cause the dinosaur mass extinction, leaving the avian dinosaurs alive to continue evolving into modern birds
There is another report on rapid changes in the asteroid belt, 'New superhighway system discovered in the Solar System',
https://www.sciencedaily.com/releases/2020/12/201209094216.htm,
also 'The arches of chaos in the Solar System',
https://advances.sciencemag.org/content/6/48/eabd1313, "Abstract Space manifolds act as the boundaries of dynamical channels enabling fast transportation into the inner- and outermost reaches of the Solar System."
My observation. This report opens the door that much dynamic change in the solar system can take place within decades, even a century, not millions or billions of years.
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