why does australia drive on the left

Ah, the left-side driving conundrum! Australia drives on the left because it inherited the habit from British colonial rule, which itself was a tradition dating back centuries. The British decided on left-side travel primarily because most people are right-handed, making it easier to wield swords or greet strangers with your right hand while passing. This left-side convention stuck around and became law in Australia as the colonies adopted British norms. Changing sides would be a logistical and costly nightmare, so the left it is, much to the bemusement of tourists used to right-side driving. So next time you're behind the wheel Down Under, remember: it's not arbitrary, it's historical stubbornness with a dash of practicality.