Science-fiction movies like "Minority Report" show people taking individual public transportation to get around the city. Would people ever give up their cars for a less-convenient mode of travel?
WHAT'S INSIDE: TRANSPORTATION
- Engines & Equipment
A car engine uses a four-stroke cycle -- how can two strokes accomplish the same tasks? Learn all about the two-stroke engine, where it's used and how it compares to a four-stroke.
The marvel we know as the helicopter began as a Chinese top consisting of a shaft -- a stick -- adorned with feathers on one end. They now buzz around the skies providing emergency medical assistance and your daily traffic report. Are you ready to meet the most versatile flying machines in existence today?