How Many Eyes Does a Housefly Have?
How Many Eyes Does a Housefly Have? The ordinary housefly has five eyes-two large “searchers” and three tiny ones. You can easily see the two big eyes that...
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Why Does an E-mail System Require Servers?
Why Does an E-mail System Require Servers? An e-mail system consists of two different servers running on a machine. One is called the SMTP server, where SMTP stands for...
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What Types of Technology Do Invisible Fences Use?
What Types of Technology Do Invisible Fences Use? Some invisible fence systems feature wires buried in the ground around a set perimeter, such as a yard. A transmitter...
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What Do Butterflies Eat?
What Do Butterflies Eat? Actually, butterflies do not eat at all. Instead of eating, butterflies get their nourishment from drinking. Butterflies feed on the nectar of...
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Why Does Poison Ivy Cause Itchiness?
Why Does Poison Ivy Cause Itchiness? The itchy rash which results from touching poison ivy is caused by oil that is found in all parts of the plant. It’s called...
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How Are Plastics Made?
Plastics are manufactured from chemicals that come from such materials as coal and petroleum. Petroleum, for example, is the source for different liquids and gases. One...
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Why Do We See Lightning Before We Hear Thunder?
Why Do We See Lightning Before We Hear Thunder? Lightning usually reaches our eyes before thunder reaches our ears because light travels faster than sound. Light...
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Why Do You Blush?
The way you feel can affect your body. If you should feel ashamed or embarrassed about something, you might blush. When you blush, your brain sends signals to tiny...
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Where Does Rain Come From?
Rain comes from clouds. There is always some moisture in the air. It evaporates from lakes and oceans. The water floats in the air as invisible vapor until the air...
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Where Does Gasoline Come From?
Where Does Gasoline Come From? Most gasoline is obtained from crude oil or petroleum, the oil that comes from oil wells. Crude oil is a fossil fuel. That means it was...
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