Pachycephalosaurs & head-butting

[Mike Taylor <mike@indexdata.com>]

hammeris1@bellsouth.net writes:
 > I thought I've read recent conclusions that their bony-skull tops
 > were far too thin to support this activity?

Not as recent as this:
http://palaeo-electronica.org/2008_1/140/index.html

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/o ) \/  Mike Taylor    <mike@indexdata.com>    http://www.miketaylor.org.uk
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