manpages are awesome. some people tend to think there are only manpages for programs, which is completely not true. take for example "man ascii" or "man hier" which display the ascii tables and an explanation of the purpose of each unix directory respectively. You can discover where the manpages on your system are located by executing 'manpath'. This will output a list of directories in a similar format to "echo $PATH". Look through the directories to find the 7zipped files containing the manpage data.
I've gotten into the habit of opening each one just out of curiosity. Its actually kind of fun if you have nothing to do.