Holocene climactic optimum

 This one was a surprise.  I looked at the edit history of 

Hypsithermal

which consist of one edit, a redirect to Holocene climactic optimum 

curprev 16:54, 21 April 2007‎ Moheroy talk contribs‎  39 bytes +39‎   created redirect to Holocene climactic optimum thank

https://en.wikipedia.org/w/index.php?title=Holocene_climactic_optimum&action=edit&redlink=1

The redirect actually goes to Holocene climatic optimum, so yes, the "Holocene climactic optimum" does no exist on wikipedia.

Too funny.