Why is it so hard to change, even when the evidence for doing so is overwhelming? This article from Scientific American, answers the question Why is a minute divided into 60 seconds, an hour into 60 minutes, yet there are only 24 hours in a day?

It is interesting, if not surprising, that these measurements were passed down from other uses and definitions that date to the earliest points in civilization. Pardon the pun… Time and time again we’ve had the opportunity to change the system to one which would be much more comfortable, that is to use a decimal system.

And of course we could ask the same about the US sticking to our short history of the English measurement system when our British brethren were able to kick that habit quite easily.