[Ditto]

I guess that log rolling thing was the first axle --- high reliability but pretty heavy overhead with all the employees needed to keep the logs rolling. ~;))

And I'd bet OSHA would have some problems with that today. Just guessing they would work a deal with the International Federation of Log Rollers in return for the appropriate campaign contributions while they work on Pharaoh Obama's Pyramid.

[TigersEye]

I never thought of it before but the log is both the axle and the wheel there.

Let's see, they built the first pyramids about 5,000 years ago. If it were an AFLCIO job under OSHA regulations they would still be working on it.