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endangered species

Life on Earth exists in a balance between the environment and the plants and animals that live on it. Throughout history, animals have become extinct when the environment changed. Scientists have discovered and documented many animals that have become extinct by studying fossils. Today, many species o... read more

how to make a soap powered boat

Propel a paper boat using nothing more than washing-up liquid! ... 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

what is a plant

Plants and animals are living things, or organisms. Plants make it possible for all the other living things to exist on planet Earth. While plants are similar to animals in some ways, they are unlike animals in many more ways. Plants, like animals, are made up of cells. ... read more

how the body work

All the organs and systems of your body work together. When they work correctly you move, you fight off germs and diseases, you heal, you learn, you grow, and you age. In other words, you live. ... read more