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Offline kiefer

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dinosuars
« on: 10/10/2006 19:12:06 »
i dont believe the meteorite story killing evrything on earth and now have my own theory. i beleive that the dinosaurs were bein killed off before the meteorite hit, but in fact the cause of their deaths was that their imunne system could no longer cope with the fumes  in the earth and were slowly suffocating to death. i havent really got any reasons for this just that i knew volcanoes were givin off alot of toxic fumes that can kill animals.

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Offline Soul Surfer

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Re: dinosuars
« Reply #1 on: 18/10/2006 17:34:53 »
If you want a silly theory about the KT boundary it's far better to think that the dinosaurs developed intelligence and after ac peiod similar to the last thousand years cocked the whole thing up by excessive breeding and over use of resources Like we are at the moment  all we need to find is the donosaur equivalent of a coke can to make it solid the meteror just came in a few thousand years later to finish the job.  :-)

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Offline simeonie

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Re: dinosuars
« Reply #2 on: 06/11/2006 23:23:04 »
some christians believe that when god threw satan down from the heavens they take it literally and he came down like a meteorite, me? i dont know never thought about it much
 

Offline Mjhavok

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Re: dinosuars
« Reply #3 on: 13/11/2006 00:12:05 »
Some christians are fruit cakes (not literally).
 

Offline that mad man

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Re: dinosuars
« Reply #4 on: 20/11/2006 20:02:52 »
I think Dinosaurs were killed off because the gravity of the Earth increased and their mass could not cope with the increase.

Maybe from meteorite bombardments and not just one sudden meteorite hit as they didn't die off quickly.

Everything in the dinosaur age was much larger than now, giant plants and ferns and also giant dinosaurs, to me that suggests less gravity.
With an increase in gravity the large body mass of the dinosaurs would be under great stress as height would depend on body mass and gravity.
Less gravity would have made it easier for a large mass to move and for some of the large gliding dinosaurs, easier to fly/glide.

Increase the gravity on an Elephant and you would find it would not be able to move much or last long.

"B"





 

Offline ukmicky

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Re: dinosuars
« Reply #5 on: 20/11/2006 23:30:31 »
I think Dinosaurs were killed off because the gravity of the Earth increased and their mass could not cope with the increase.

Maybe from meteorite bombardments and not just one sudden meteorite hit as they didn't die off quickly.

Everything in the dinosaur age was much larger than now, giant plants and ferns and also giant dinosaurs, to me that suggests less gravity.
With an increase in gravity the large body mass of the dinosaurs would be under great stress as height would depend on body mass and gravity.
Less gravity would have made it easier for a large mass to move and for some of the large gliding dinosaurs, easier to fly/glide.

Increase the gravity on an Elephant and you would find it would not be able to move much or last long.

"B"
And i suppose the sextillion tonnes of metorites which must have fell from the sky for your theory to be correct were of the very rare and highly sort after  Pollitically correct and Environmentally Friendly Slow moving variety.   :) 
 

Offline that mad man

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Re: dinosuars
« Reply #6 on: 21/11/2006 20:34:45 »
Na, and the only PC I believe in is the one I use!

I did say maybe, since there are very few dinosaur fossiles around and as yet we are all still speculating on what may have happened.

I find it hard to believe that in over 230 million years the earth's gravity has not changed or had an impact on organic growth.

It's to do with body mass and skeletal strength. Get too large and the skeleton will not be able to sustain the weight and collapse.
In a 6 foot human under present conditions, the thigh bone will break at around 10 times the human weight, so that can be used as a guide.
Have a read up on bio mechanics as there is a limit to height and weight.
Some of the large dinosaurs were estimated at over 50 foot high and in excess of 80 tons. For them to sustain their weight, under todays conditions they would need thigh bones much thicher than they did.
But they didn't.

A mature t-Rex at around 25ft tall (a small dinosaur) and weighing in at around 5 tons had hollow thigh bones, any running or jumping would have been bio mechanically impossible. At that size and weigh the bones would snap! They didn't snap so there is something else going on.


"B"


 

Offline ukmicky

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Re: dinosuars
« Reply #7 on: 21/11/2006 22:36:46 »
I'm not an expert and their are others who could give you a much better answer but off the top of my head i would say not all bones are the same and the strength of the dinosaur limb and its ability to withstand the forces generated during a sprint are not totally dependent of the mass of the bone but rather on many factors.

I  believe dinosaur bones were structurally very very strong compared to humans due to there composition and how the fibres which make up the bones were strung together.
Also the diet of the host, type of bone - the bones elasticity, the muscular makeup of the limb and how evolution has enabled the forces generated during a sprint to be spread around the body of an animal evolved to run and hunt for its food are big factors .

Also how fast did t-Rex actually run there are many people who believe t-Rex was mainly a scavenger and its live prey were large but slow moving dinosaurs either through injury or design.

« Last Edit: 21/11/2006 23:06:55 by ukmicky »
 

Offline daveshorts

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Re: dinosuars
« Reply #8 on: 22/11/2006 11:36:26 »
I find it hard to believe that in over 230 million years the earth's gravity has not changed or had an impact on organic growth.

A mature t-Rex at around 25ft tall (a small dinosaur) and weighing in at around 5 tons had hollow thigh bones, any running or jumping would have been bio mechanically impossible. At that size and weigh the bones would snap! They didn't snap so there is something else going on.

I am not sure how you are propsing that the earth's gravity has changed over the last 100million years, as it would either require the earth to be accreating mass very fast - remember the meteorite everyone is talking about was at the most a cubic kilometre of rock - not much compared to the earth), or the gravitational constant to change radically. If the second were to be the case it would do very strange things to the earth's orbit, and hence it's temperature.

Very large dinosaurs didn't have to jump, they could have just plodded.

Also an increase in gravity wouldn't have done anything to most of the donosaurs which were more ocnventional sizes.
 

Offline thebrain13

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Re: dinosuars
« Reply #9 on: 26/11/2006 22:30:06 »
I think we might of found the incredible amount of matter it would take to increase the strength of gravity.
 

Offline ukmicky

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Re: dinosuars
« Reply #10 on: 27/11/2006 00:20:30 »
?
 

Offline Mjhavok

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Re: dinosuars
« Reply #11 on: 27/11/2006 11:07:50 »
??
 

Offline Raliel

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dinosuars
« Reply #12 on: 10/06/2007 11:38:39 »
the simple answer as to why the large dinos died out is that they were overspecialised and could not cope with massive environmental change, the smaller species followed soon after as they were out competed by mammals and avians.... avians incidently are evolved dinos
 

Offline Batroost

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dinosuars
« Reply #13 on: 10/06/2007 15:52:57 »
A much more entertaining answer is that we develop time travel and go back and eat them!

(Not my idea - appeared in the comic 2000AD about thirty years ago under the story title "Flesh!").
 

Offline Raliel

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dinosuars
« Reply #14 on: 10/06/2007 19:33:22 »
I remember it distinctly....
 

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