Page 260 - DK Children's Encyclopedia

The story of...

Transportation

Humans have been inventing new ways of moving Green travel
The bicycle is one of the most
from one place to another for thousands of years. environmentally friendly (green)
At first, people used animals for transportation on forms of transportation, because it
land. Later, the wheel was invented, then engines. has no engine to release harmful
gases into the air. Other forms of
People started crossing water using rafts and simple green travel include electric
dugout canoes, while air travel began with hot-air cars and buses that run on
clean hydrogen gas.
balloons. We have even traveled into space!

Horse and cart
Cyclists and their
passengers wear a
helmet to keep their
head protected
if they fall.

Animals
Animals were our first
type of transportation other
than walking. At first, people
rode on them. In 3500 bce the
wheel was invented, and
carts and carriages were
pulled by horses, oxen,
and other animals.

Ancient boats
were powered
by people
using oars.
Model of a boat,
from ancient Egypt

Crossing water
The first boats were log boats,
carved out of tree trunks, and
basic rafts made from reeds Turning the
pedals makes
and sticks. People used a bicycle’s
them to travel around and wheels go
also for fishing. around.

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