The last starating point that I picked up is Cars. It is a wide-range theme for doing research. First, I have done a mindmap on it, expanded ideas from 5 directions. It starts form history of cars. Then, civilian cars and motor sports also included. Automotive fuels that cars currently using. Car tuning (Modification) is popular and welcomed by young people who wish to own a unique or a power enhanced car.
Also, there are pictures/photographs/concept arts below are really helpful to understand the theme. A few shot videos are useful to explore and understand car tuning; types of car fuels, history of cars and the WRC motor racing.
A car (or automobile) is a wheeled moto vehicle used for transportation. Most definitions of cars say they run primarily on roads, seat one to eight people, have four tires, and mainly transport rather than goods.