I was looking into how the dinosaurs went extinct, and I was curious as to how they went extinct. It's obvious knowledge that it was the asteroid impact, but did they ALL go extinct? Or did the world just get covered by cloud, went cold, and lead to the death of the other dinosaurs? Thanks.
Responses (1)
It is not "obvious knowledge", it is guessing. Oil technicians found something at Chixcalub, and they guessed it was a meteor crater because that is the only thing they knew. Other scientists have inspected the data and found no evidence for a meteor.
That happens a lot. Berringer Crater in Arizona is commonly called "Meteor Crater" because that is what Mr. Berringer guessed it was when he bought the ground to mine the iron. No iron was ever found. Grand Canyon is assumed to have been carved by water, but there is not enough sand downstream to support that assumption. There is one big snag in any dinosaur theory: frogs. Frogs lived with dinosaurs, and whatever killed the dinosaurs did not kill the frogs.
More info: www.thunderbolts.info/tpod/00subjectx.htm
Something else you would want to consider is the change in plants. Before the extinction, the world had a lot of evergreens and ferns, gymnosperms, which means cold weather plants. After the extinction, the world had a lot of flowering plants, angiosperms, which means four-season plants.
en.wikipedia.org/wiki/Gymnosperm
en.wikipedia.org/wiki/Flowering_plant