Page 175 - Allah's Gentle Artistry
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Ducks, like all water birds, have hollow bones—one rea-
son why they are able to float on the water. Ducks also have
air sacks in their bodies that resemble little balloons. When
they fill with air, they help them float on the water.
When a duck wants to dive, it pumps the air out of the
sacks. With very little air left in its body, its buoyancy is de-
creased and it can easily go under the water.
