What Is a Mirage?
What Is a Mirage? Mirages are optical illusions produced by extraordinary atmospheric conditions. They can be non-existent sheets of water or similar visions, inverted...
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Why Do We Have Two Eyes?
Why Do We Have Two Eyes? We have two eyes placed in the front of our heads because we need to be able to judge distances and to see in depth. The change in the position...
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What Are Baigong Pipes?
What Are Baigong Pipes? The Baigong pipes are a series of pipe-like features found on and near Mount Baigong, about 40 km southwest of the city of Delingha, in the...
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Why Do Bats Make High-pitched Sounds?
Why Do Bats Make High-pitched Sounds? Bats use high-pitched squeaks called ‘ultrasounds’ to find their way about. They are nocturnal animals. That is they move about by...
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How Do Mirrors Work?
How Do Mirrors Work? Most mirrors are made of a sheet of polished glass with a thin coat of silver paint on the back. The silver backing reflects the light that falls...
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