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Author Topic: [glow=red,2,300]Help with the extinction of Dinosaurs[/glow]  (Read 2048 times)

Offline Muchomank

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I am doing a case study on the Theory of how the Dinosaurs became extinct. Please may you post all theories that you can find and your own views,
Much Apreciated, Muchomank.


 

Offline Bass

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[glow=red,2,300]Help with the extinction of Dinosaurs[/glow]
« Reply #1 on: 03/04/2009 02:21:00 »
too much refined sugar in their diets? ::)

What do you think a diabetic dinosaur looked like? (lifeless?)
 

Offline RD

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[glow=red,2,300]Help with the extinction of Dinosaurs[/glow]
« Reply #2 on: 03/04/2009 02:34:09 »
The K-T boundary layer enriched with iridium is the "smoking gun" for a meteor impact.

However this is an interesting hypothesis for other mass extinction events ...

Quote
Explosions in Space May Have Initiated Ancient Extinction on Earth
04.06.05
Scientists at NASA and the University of Kansas say that a mass extinction on Earth hundreds of millions of years ago could have been triggered by a star explosion called a gamma-ray burst. The scientists do not have direct evidence that such a burst activated the ancient extinction. The strength of their work is their atmospheric modeling -- essentially a "what if" scenario.

The scientists calculated that gamma-ray radiation from a relatively nearby star explosion, hitting the Earth for only ten seconds, could deplete up to half of the atmosphere's protective ozone layer. Recovery could take at least five years. With the ozone layer damaged, ultraviolet radiation from the Sun could kill much of the life on land and near the surface of oceans and lakes, and disrupt the food chain.
http://www.nasa.gov/vision/universe/starsgalaxies/gammaray_extinction.html
« Last Edit: 03/04/2009 02:37:18 by RD »
 

Offline JimBob

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[glow=red,2,300]Help with the extinction of Dinosaurs[/glow]
« Reply #3 on: 03/04/2009 04:58:08 »
Muchomank,

If I am wrong, I apologize in advance. However, I suspect you are a student and this is a homework assignment. It is my policy to NOT answer homework questions. The internet has numerous good search engines, such as Google, Yahoo, Ask.com, etc. So f you are a student, please use these, not us, to do your homework.

« Last Edit: 03/04/2009 17:02:30 by JimBob »
 

Variola

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[glow=red,2,300]Help with the extinction of Dinosaurs[/glow]
« Reply #4 on: 03/04/2009 10:43:29 »
The dinosuars are not extinct, they are indeed still alive, and are often to be found in forums in the guise of Doctor Beaver and Jimbob!!!  ;D

Muchomank. have a google and find some theories first, then if you have any further questions on anything specific, then come back and post them. People will be more willing to help then!



 

The Naked Scientists Forum

[glow=red,2,300]Help with the extinction of Dinosaurs[/glow]
« Reply #4 on: 03/04/2009 10:43:29 »

 

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