BBC Horizon did not show the single impact layer in North America, from New Mexico to Saskatchewan Canada. This layer clearly shows there can be only one large impact, not two.
New debates last updated:
December 13, 2004
No Show 2:
The fourth drawer Norm McLeod did not open............		 No Show 3:
Amphibians (Toads) surviving the hard Swedish winters (glycerol in their blood)		 No Show 4: 300.000 years between Chicxulub and the K/T boundary?? How can you squeeze them in here? No Show 5: The explanation for the burrows other than Stinnesbecks. Interesting debate on dinosaur diversity.
 

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A Recently published figure (see Fastovsky, D.E., Huang, Y., Hsu, J., Martin-McNaughton, J., Sheehan, P.M., and Weishampel, D.B., 2004, Shape of Mesozoic dinosaur richness
Geology, v. 32, p. 877–880.)

 

Where is the decline suggested by Norm McLeod?
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