I’m not sure exactly where I came across the reference to this article about [ketchup] — apparently it hit the blogosphere a while back — but like many others I found it quite fascinating.
The author, Malcolm Gladwell, writes periodically in [The New Yorker] on a variety of topics and apparently makes them all equally fascinating. His articles are archived [here](http://gladwell.com/archive.html). (Bonus pick: [How caffeine created the modern world].)
[The New Yorker]: http://www.newyorker.com/
[How caffeine created the modern world]: http://gladwell.com/2001/2001_07_30_a_java.htm