Climate Change Killed Dinosaurs??
- Thread starter redhen
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I THINK that both the scientist and author of that article are exploiting the term "climate change" because of the current popularity, and misunderstanding of the subject. If the title was "Changing weather patterns may have been involved in the extinction of the dinosaurs" it would have attracted less readers.
Did changes in climate affect the dinosaurs? I don't know. I wasn't there but it seems reasonable to assume it may have, especially since the climate has been changing since the beginning of earth history. To me the meteor theory still makes the most sense and has the most evidence to back but that doesn't mean other factors were not also involved.
Besides, chickens are descendants of the dinosaurs so they all didn't go extinct, just the big fat ones.
I THINK that both the scientist and author of that article are exploiting the term "climate change" because of the current popularity, and misunderstanding of the subject. If the title was "Changing weather patterns may have been involved in the extinction of the dinosaurs" it would have attracted less readers.
Did changes in climate affect the dinosaurs? I don't know. I wasn't there but it seems reasonable to assume it may have, especially since the climate has been changing since the beginning of earth history. To me the meteor theory still makes the most sense and has the most evidence to back but that doesn't mean other factors were not also involved.
Besides, chickens are descendants of the dinosaurs so they all didn't go extinct, just the big fat ones.
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I took an Intro to Paleontology class in college and there was more evidence against the asteroid theory than for it.
Ex. No frog species went extinct. Wouldn't acid rain kill frogs?
40 foot long crocodiles survived the K2 boundary but T-Rexs (45 feet) didn't.
Many mammal species went extinct.
Large turtles also survived.
Now if the asteroid whacking/animals survived who could hibernate happened, why did very large reptiles survive?
Climate, sea level combined with disease is the most likely cause. It's not as dramatic as the asteroid theory but it is probably more likely.
My professor's own personal theory is that climate/sea level changes caused more competition in the oceans and affected their food web (shark and marine reptile extinctions) and land bridges opened to allow more dinosaur species to intermingle, spread disease and outcompete one another. There is evidence in the Hell Creek formation in Montana that dinosaurs were already nearly extinct by the time the asteroid hit.
Creatures that were both aquatic and terrestrial such as turtles and crocodiles were more adaptable and fared better--into the present day
Ex. No frog species went extinct. Wouldn't acid rain kill frogs?
40 foot long crocodiles survived the K2 boundary but T-Rexs (45 feet) didn't.
Many mammal species went extinct.
Large turtles also survived.
Now if the asteroid whacking/animals survived who could hibernate happened, why did very large reptiles survive?
Climate, sea level combined with disease is the most likely cause. It's not as dramatic as the asteroid theory but it is probably more likely.
My professor's own personal theory is that climate/sea level changes caused more competition in the oceans and affected their food web (shark and marine reptile extinctions) and land bridges opened to allow more dinosaur species to intermingle, spread disease and outcompete one another. There is evidence in the Hell Creek formation in Montana that dinosaurs were already nearly extinct by the time the asteroid hit.
Creatures that were both aquatic and terrestrial such as turtles and crocodiles were more adaptable and fared better--into the present day
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No they aren't. Birds appeared in the fossil record before bird-like dinosaurs did. Parallel evolution. Birds and bird-like dinosaurs share a common ancestor, but dinosaurs didn't "turn into birds." There were already birds.
No they aren't. Birds appeared in the fossil record before bird-like dinosaurs did. Parallel evolution. Birds and bird-like dinosaurs share a common ancestor, but dinosaurs didn't "turn into birds." There were already birds.
"The discovery of traces of flesh in a 68-million-year-old Tyrannosaurus rex bone ties the King of the Dinosaurs to modern-day species and, scientists say, heralds a "milestone" shift in paleontology.
"Based on the small sample we've recovered, chickens may be the closest relatives (to T. rex)," says geneticist John Asara of Beth Israel Deaconess Medical Center in Boston, co-leader of a team reporting the discovery of faint traces of chicken-like bone lining preserved inside a dinosaur drumstick.
In studies reported in the journal Science, Asara and colleagues conclude that seven traces of proteins detected in purified T. rex bone most closely match those reported in chickens, followed by frogs and newts"
http://www.usatoday.com/tech/science/discoveries/2007-04-12-trex-protein_N.htm
"Based on the small sample we've recovered, chickens may be the closest relatives (to T. rex)," says geneticist John Asara of Beth Israel Deaconess Medical Center in Boston, co-leader of a team reporting the discovery of faint traces of chicken-like bone lining preserved inside a dinosaur drumstick.
In studies reported in the journal Science, Asara and colleagues conclude that seven traces of proteins detected in purified T. rex bone most closely match those reported in chickens, followed by frogs and newts"
http://www.usatoday.com/tech/science/discoveries/2007-04-12-trex-protein_N.htm
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No they aren't. Birds appeared in the fossil record before bird-like dinosaurs did. Parallel evolution. Birds and bird-like dinosaurs share a common ancestor, but dinosaurs didn't "turn into birds." There were already birds.
Ok, I stand corrected. That makes more sense anyways but a large dinosaur sized chicken would make a nice meal.
No they aren't. Birds appeared in the fossil record before bird-like dinosaurs did. Parallel evolution. Birds and bird-like dinosaurs share a common ancestor, but dinosaurs didn't "turn into birds." There were already birds.
Ok, I stand corrected. That makes more sense anyways but a large dinosaur sized chicken would make a nice meal.
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Dinosaur Marek's perhaps.
that's only half joking...could have been really what happened. Or with all those HUMONGOUS piles of poo and nobody to clean the huge coop it could've been coccidosis
Dinosaur Marek's perhaps.
Dinosaurs are NOT extinct:
Quote:
From Scientific American:
"A group of scientists have done DNA studies concluding that silkies, roaming in large flocks, caused the extinction of at least 30 different species of dinosaurs and 3 species of early mammals."
From Scientific American:
"A group of scientists have done DNA studies concluding that silkies, roaming in large flocks, caused the extinction of at least 30 different species of dinosaurs and 3 species of early mammals."
Now come on!
We all know that raccoons, dogs, hawks and coyotes did in the dinosaurs.
Pay attention to BYC guys!
Imp
We all know that raccoons, dogs, hawks and coyotes did in the dinosaurs.
Pay attention to BYC guys!
Imp
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