Book excerpt: See how transportation has changed over the years Transportation carries people from one place to another, but it has changed over time. Long ago airplanes began to fly in the sky, now airplanes fly very high and far. This book looks at how transportation has changed over the years Historical and modern-day photographs interspersed throughout these books clearly illustrate how aspects of daily life change over time, while simple text shows readers how to compare and contrast ideas. Timelines in the back of each book give readers perspective by listing key inventions and developments that have modernized our lives.