[h5n1]

Although I agree that the issue of money supply is not described well here, it's not a very long article, nor is it really aiming to explain all that. I think it's fun to see the average lifespan of bills. Who'd'a thunk that most small ones are in use for less than 5 years??

[Tangurena]

I noticed that they left out $2 bills. Many people save them for some reason (they're lucky! they're rare!) and some of the charts showing lifespans that include $2 bills show their lifespan about 10x the life of other bills.

[swaits]

I found the lifespan of each note interesting too. The rest of it was far oversimplified for my taste. But hey, I'm not everyone! :)