Yes, I expect there might be differences.
. It gets me curious about metabolism and hormones and such, to see apparent cycles. I wonder, for example, if a gland produces something and then stops until levels get low enough that it's triggered again (eg. after 4/5/7 days, depending on the gland/hormone/mix).
We will eventually get a bike carrier. At the moment we're happy just riding locally, and can go a little further afield cramming the bikes in the back of the car. Have you seen the bikeways around Brisbane River in Brisbane city - quite awesome, even the bridges catering for it with clear bike lanes and all. We definitely want to do that while visiting my brother some time.
Cheers,
Marc