How Can a Fly Walk on the Ceiling?
How Can a Fly Walk on the Ceiling? A fly can walk across ceilings because it has sticky feet. Each of the fly’s six feet are equipped with tiny claws and hairy...
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Why Does a Cactus Have Spines?
Why Does a Cactus Have Spines? First, let’s look at the spines of cactus for what they really are – the main part of cactus often functions as a modified...
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How Fast Does the Earth Spin?
How Fast Does the Earth Spin? The Earth is like a big ball, and it spins so as to turn around once every 24 hours. This means the surface of the Earth is moving pretty...
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How Are Mountains Formed?
How Are Mountains Formed? Mountains are created by slow movements in the earth’s crust. In some places, heat and pressure deep inside the earth slowly buckle the...
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When Were Mirrors First Used?
We will never know who first discovered the idea of a mirror. But our earliest ancestors must have noticed that they could see their reflections in the surface of a...
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