Why Does the Sahara Change Shape?
The Sahara, the world’s greatest dry hot desert, stretches right across the north of Africa where there is almost no rainfall and, consequently, little…
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Sand
What Is Shale?
Shale is a fine-grained, earthy, sedimentary rock rather like clay, but, unlike clay, it is formed in thin layers. It is usually harder than…
What Is Glass Made From?
Glass is made naturally from a fusion of silica (sand), soda and lime. This fusion can be achieved merely by lightning striking in a place w
How Many Eyelids Does a Camel Have?
How Many Eyelids Does a Camel Have? A camel’s large, dark eyes are protected by three eyelids. The two outer eyelids have long, thick eyelas
What Is a Sea Cucumber?
What Is a Sea Cucumber? The sea cucumber looks as if it comes from a garden, instead of the ocean floor as it is a sea animal with a sausage