It seems that paleontologists may never stop debating the cause of the great dinosaur extinction which occurred 65 million years ago at the end of the Cretaceous period. The following visual aids have been prepared to aid the layman in understanding the competing extinction theories currently in vogue.

 

The first theory blames the great lizards’ downfall on their own poor intelligence due to Nature’s supplying them with brains the size of walnuts. This is known as the "Dinosaurs Were Just Dumb" hypothesis and can be summarized thusly:

 

extinctiontheory1

 

Most researchers today, however, subscribe to the belief that the dinosaurs were done in by an unavoidable airborne catastrophe. This is referred to as the "Death From Above" theory and goes something like this:

 

extinctiontheory2

 

And so the debate rages on.

 

 

first image by dan regan of shoeboxblog

second image: bizarroblog

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