Why Were There Windows of Different Sizes in Ancient Homes?
Why Were There Windows of Different Sizes in Ancient Homes? The earliest windows were just holes in a wall. Later, windows were covered with animal hide, cloth, or...
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When Do Plants Breathe?
When Do Plants Breathe? Technically, plants don’t breathe. But plants do respire. Like animals, they use oxygen in the process of breaking down carbohydrates, and use...
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Why Can Owls See Well at Night?
Why Can Owls See Well at Night? The night vision of owls is hundred times as keen as that of human beings, because their eyes are especially adapted for seeing in the...
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When Does a Chameleon Change Color?
When Does a Chameleon Change Color? A chameleon will change color when it senses danger. This remarkable member of the lizard family can change color to match its...
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Why Do Some Flowers Close up at Night?
Why Do Some Flowers Close up at Night? Flowers close their petals at night because they are protecting the pollen and other reproductive parts of the plant that are...
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