Cars are amazing! And one of the most amazing things about them is that no-one invented them—no single person, that is. There was no scribbling on the back of an envelope, no lightning flash of inspiration, and no-one ran down the street crying "Eureka". All the different parts—the engine, the wheels, the gears, and all the fiddly bits like the windscreen wipers—somehow came together, very gradually, over a period of about five and a half thousand years. How did it happen? Let's take a closer look!
Beasts of Burden
It all began with the horse. Or the camel. Or perhaps even the dog. No-one really knows which animal prehistoric humans picked on first. People tended to stay put, living more locally than they do now. If they needed to move things about, they had to float them down rivers or drag them by sledge. All that started to change when humans realized the animals around them had raw power they could tap and tame. These "beasts of burden" were the first engines.
By about 5000BCE, there were sledges and there were animal "engines"—so the obvious thing to do was hitch them together. The Native Americans were masters at this. They invented the travois: a strong, A-shaped wooden frame, sometimes covered with animal skin, that a horse could drag behind it like a cart without wheels. First used thousands of years ago, the travois was still scraping along well into the 19th century.
The next big step was to add wheels and turn sledges into carts. The wheel, which first appeared around 3500 BCE, was one of the last great inventions of prehistoric times. No-one knows exactly how wheels were invented. A group of prehistoric people may have been rolling a heavy load along on tree trunks one day when they suddenly realized they could chop the logs like salami and make the slices into wheels. However it was invented, the wheel was a massive advance: it meant people and animals could pull heavier loads further and faster.
Huge and heavy, the first solid wheels were difficult to carve and more square than round. When someone had the bright idea of building lighter, rounder wheels from separate wooden spokes, lumbering carts became swift, sleek chariots. The ancient Egyptians, Greeks, and Romans all used chariots to expand their empires. They were a bit like horse-drawn tanks.
(Continuity about the history in next blog)
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