why we cannot fly like birds?

4] Why we cannot fly like birds?

 An obvious answer to this question by any

layman will be, "We cannot fly like birds

because we do not have natural wings".

However, this answer does not explain thisquestion completely because even if weattach artificial Wings to Our arms we are

still unable to fly. Then how do the birds fly?

Birds have wings to assist them in flying.

Apart from this, they have very light frames

and their bones are also light.

                        Moreover they have air sacs, which further reduce their body weight.The muscles of birds are quite strong in

Comparison to their body weight. They have

a streamlined body, which enables them to

fly swiftly because air offers less resistance

to such objects. With the help of their strong

muscles, they can easily fly with their wings.

When a bird flaps its wings, it pushes

the air down and rises above. Our bodies

are heavier than those of birds. As such, we

would need enormously big wings. But thenwe do not have any air sac and our muscles

are not comparatively strong enough.

Hence, we cannot flap the artificial wings.Birds having lighter bodies can fly more

easily while heavy birds face difficulties in

flying. For example, the cock and peacock

cannot fly very high. There are also birds

like ostrich and penguin, which are even

heavier. These birds cannot fly at all. They

can merely run. Similarly, we cannot fly like

birds even if we attach artificial wings to

Our arms.