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why do oily things stain clothes

Removing stains straight away helps to prevent them reacting with the air. ... read more

where did the sand in the sahara desert come from

The sand in the Sahara is a result of rock erosion and weathering. ... read more

what are whiskers

Find out how these specialised hairs help animals to sense their surroundings. ... read more

what is an animal

Animals are living creatures. They include very small creatures such as dust mites and very large creatures such as whales. Animals are multi-cellular organisms that eat food to survive. They cannot get energy from the sun like plants do. Most animals can move on their own. ... read more

space exploration

Humans have always had a need to explore. In ancient times, people could study only the places where they lived. They could only wonder about the rest of the world and what might exist in the universe. Over the years, new technologies developed. With improved modes of transportation, we could explore ... read more