The client program have too old graphics but it is no important for strategic games.
Look at the science implementation of the game. It is Civilopedia screen laying over the main game screen.
For more screenshots visit the official game site or ask me.
In the russian-languaged version of this site there are many of these screenshots but our webmaster is too lazy to move them to the english site.
And wow, see the Link section of official site. This page is not changed since 1999!