The discovery of gold in August 1851 brought a dramatic change to the quiet sleepiness of the settlement of Port Philip.
The sleepiness of the central area makes a refreshing change from the bustle of the coast.
To cope with daytime sleepiness, 65 percent drink caffeinated beverages.
Two-thirds say sleepiness makes concentrating and handling stress on the job harder.
Sleepiness leads to accidents, and not just those in which drivers wake up behind the wheel.
If daytime sleepiness becomes overwhelming, limit nap time to a single nap of less than one hour, no later than 3 p.m.