added educational resource to the "Oxygen as an evolutionary constrai…

…nt" page
NESCent · Mar 15, 2010 · 943385c · 943385c
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diff --git a/app/views/layouts/_introduction.rhtml b/app/views/layouts/_introduction.rhtml
@@ -38,6 +38,13 @@ on the new records and supplemental material a registered account is required.
 <p>
 If you have already registered, please log in. If not, please click the 'Register' link from top menu to register to the system.
 </p>
+
+<h3>Educational Resource</h3>
+<p>
+<a href="http://evolution.berkeley.edu/evolibrary/news/091101_oxygenconstraint">Oxygen as an evolutionary constraint</a>
+</p>
+
+
 <h3>Web Citation</h3> 
 <p>"Maximum Size Database." 2009. Phanerozoic Body Size Trends through Time and Space Working Group. National Evolutionary Synthesis 
 Center. (date accessed by user) http://bodysize.nescent.org/