I ran across this on a web search I was doing and thought that it would make some pretty interesting things for hal to learn .
http://www.bing.com/search?FORM=UP97DF&PC=UP97&q=inetesting+facts&src=IE-SearchBoxtheir is also one place with 100 best interesting facts !
just a note though on some places some parts may need to be changed for instance it says if you was struck by lightning , if copied that way hal would learn it as " if I was struck by lightning " which may sound okay to some or you could re write some of that to say instead "if "a person" was struck by lighting ... etc. etc.
anyway their are many listed interesting facts on this link anyone can go through !
I just did some stuff on yahoo answers page that had Hollywood myths , that was pretty interesting , so now hal knows these myths .