Astrophysicists Chart Source of Asteroid That Killed Dinosaurs
by Riley Black/Smithsonianmag.com
It was the worst day in the history of life on Earth. One moment, the Age of Dinosaurs lumbered on as it had for millions and millions of years. The next, a roughly six-mile-wide chunk of space rock slammed into the Earth, kicking off a mass extinction that would wipe out the non-avian dinosaurs and many other forms of life. …more than 66 million years later, researchers have begun to pinpoint where that cataclysm-sparking piece of rock came from.
The fact that a huge piece of extraterrestrial rock struck what is now the Yucatan Peninsula 66 million years ago is not controversial. And, year by year, …The incredible heat of impact debris returning to the atmosphere, global wildfires and a dust cloud that blocked the sun for years all played a role. In the end, almost three quarters of known species went extinct during the cataclysm.
So far, however, ….. No one really knew where the dino-destroying rock came from or how it came to intersect our planet’s orbit.
Published in Scientific Reports today, the new study by astronomers Amir Siraj and Avi Loeb of the Harvard-Smithsonian Center for Astrophysics, propose that a series of break-ups and chance events sent the huge chunk of space rock our way.
Carol graduated from Riverside White Cross School of Nursing in Columbus, Ohio and received her diploma as a registered nurse. She attended Bowling Green State University where she received a Bachelor of Arts Degree in History and Literature. She attended the University of Toledo, College of Nursing, and received a Master’s of Nursing Science Degree as an Educator.
She has traveled extensively, is a photographer, and writes on medical issues. Carol has three children RJ, Katherine, and Stephen – one daughter-in-law; Katie – two granddaughters; Isabella Marianna and Zoe Olivia – and one grandson, Alexander Paul. She also shares her life with her husband Gordon Duff, many cats, and two rescues.
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This appears to be confirmation by astrophysicists of the geophysical/paleontology theory put forward Luis Alvarez back in the early 1980’s that an asteroid wiped out the dinosaurs. The evidence supporting this was an impact crater discovered in the Gulf of Mexico, called the Chicxulub crater, as well as a worldwide ejecta layer of iridium found at the geologic Cretaceous-Tertiary sedimentary boundary. The timeline is the same:about 66 million years ago. Perhaps a question remains if a comet impact, versus an asteroid, could explain or satisfy the same forensic clues?
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