**Earth: The Dynamic Blue Planet**
Earth, our home, is a unique and dynamic planet teeming with life and characterized by its diverse ecosystems, complex climate systems, and geological activity. It is the third planet from the Sun and the only known planet to support life. This distinction makes Earth a focal point of scientific research and exploration.
Earth’s formation dates back about 4.5 billion years, arising from the accretion of matter in the early solar system. Its spherical shape, slightly flattened at the poles and bulging at the equator, is due to its rotation. Earth’s composition includes a core made of iron and nickel, a mantle of semi-solid rock, and a crust that forms the continents and ocean floors.
The planet’s atmosphere is composed primarily of nitrogen (78%) and oxygen (21%), with traces of argon, carbon dioxide, and other gases. This atmosphere is crucial for life, providing essential gases for respiration, protecting life from harmful solar radiation, and regul
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