Correlation is not causation: charts of weird things that correlate with each other

When one of my grandsons was six years old, he used to think that this cartoon was the funniest thing he ever saw. 

For some reason everyone he told about it looked at him kinda funny. And, yes, he's still a major geek.

Tyler Vigen's "Spurious Correlations" website has a ton of these examples of odd relationships, and he's published a book containing many of them.

If you want more, go to this page of charts, and keep clicking "next" at the bottom of each page to get through all 30,000.