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anatomy of a spanish conquistador

How a small army of Spaniards brought an entire civilisation to its knees. ... read more

atoms and elements

Atoms are the building blocks of all matter. Atoms are very small. Many atoms put together make up everything in the world. Atoms are so small that you cannot see an individual atom without a special microscope. All atoms are made of the same basic parts. Putting these parts together in different ways... read more

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

the parts of the earth

When studying the Earth, scientists look at the surface of the Earth and the parts that are above and below it. The atmosphere is a part above the surface while the core is a part below the surface. All of Earth’s parts work together to make life possible. The Earth’s Layers Earth is a terrestrial... read more

electricity and magnetism

Electricity and magnetism are everywhere. Electricity is a form of energy. Magnetism is also a form of energy. They make it possible for televisions, computers, and many other electronic devices to exist. Medicine uses them to help treat illnesses in humans and animals. ... read more