Bar charts and line graphs can be combined. Climate graphs are an example of this. The x-axis shows the months of the year and there are two y-axes to show average temperature and total rainfall.

It's 2013. We should all know that there are clear differences between calling something a nerd and calling someone a geek. This is a fact!

The Knowledge Graph is powered by both private and public databases, including Wikipedia, Freebase, and the CIA’s World Factbook, that feed into the graph’s current storehouse of information ...

The euro zone has Greece. The United States has Mississippi. Or Missouri. The difference between the U.S. and Europe is that when the Greek economy "pulls a Mississippi" (or perhaps I should say ...