Why Is Zebra Striped?
Why Is Zebra Striped? Zoologists believe the stripes on a zebra could be one of several reasons. It could be basically for camouflage very much like the military...
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How Does a Camera Take Pictures?
How Does a Camera Take Pictures? A camera uses light to record a picture on film where light rays acts on a specially prepared sensitive surface of the film. If light...
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Why Do Tennis Balls Bounce?
Why Do Tennis Balls Bounce? Like many other types of balls, tennis balls have a hollow center filled with air. Like all gases, the air inside a ball moves around easily...
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What Are the Whiskers for on an Animal’s Face?
The whiskers on an animal’s face are organs of touch. They help the animal sense what’s going on around it. Scientists call whiskers vibrissae...
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What Is the Origin of the Umbrella?
What Is the Origin of the Umbrella? Umbrellas were originally used by the slaves of ancient Egypt and Persia to hold over the heads of their masters as protection...
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How Can Birds Perch on Electric Wires Without Getting Shocked?
How Can Birds Perch on Electric Wires Without Getting Shocked? Birds don’t get shocked when they sit on electrical wires because they are not good conductors of...
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How Do Peanuts Grow?
How Do Peanuts Grow? Peanuts are the fruit of the peanut plant. The peanut is a kind of pea, not a nut. Like other peas, peanuts bear seeds in containers called pods...
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Why Does Milk Spill over When It Boils?
Why Does Milk Spill over When It Boils? Since milk is a colloid and has many substances in suspended form. These substances are mainly protein, sugar and fat. On...
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Can You Hear the Sea in a Seashell?
Can You Hear the Sea in a Seashell? No, you can’t hear the sea in a seashell. When you hold an empty conch shell to your ear, you hear a faint roaring sound, but...
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When Was the First Bicycle Built?
When Was the First Bicycle Built? The bicycle was first built-in 1790. It was simply a wooden bar with a wheel at each end and had no pedals or steering bar. The rider...
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