All speculation and hypotheses, at minimum no more believable than the Genesis account.
Comets entering our atmosphere become extremely hot—and one big enough actually hit to wipe out major strains of dinosaurs would result in a cooling period? And not knock Earth out of orbit? And kill all the dinosaurs worldwide?
I hope you got that book from the 99 cent bin.
Thanks for the ping!
“Hope you got the book out of the 99 cent bin.”
Actually, I got the book on the recomendation of people here at FR. It was either Sunken Civ or blam. It is a very readable account, but at the same time goes into considerable detail as to the scientific method by which the “speculation and hypotheses” were tested. A good read if one has any desire to better understand the scientific method. Those who prefer belief to knowledge will, of course, not be interested.
“Comets entering our atmosphere become extremely hot.”
This is true, but if they are big enough, they can make it down to the ground, and if they hit an ice sheet send large chunks of ice flying far away. Regarding the dinosaurs, the Yucatan strike was probably caused by an asteroid or meteor the size of Washington, DC cubed. We get hit by comets, asteroids and meteors. Another source, which I also did not get from the 99 cent bin is “Comet” by Carl Sagan and Ann Druyan, the 1997 rewrite.