A Field Guide to AUTOMOTIVE TECHNOLOGY

Why gas-guzzling cars? Why is our transportation dominated by four wheels powered by a gasoline-snorting engine? People have been using wheels for nearly 6,000 years. The invention of the wheel probably occurred many times in many places and no event of inception was recorded. At first wheels were powered by the people who made them. Hitching animals to move carts started around 4,000 years ago.