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Earth is the only planet with life and liquid surface water. Learn about its structure, atmosphere, climate, history, and more from this comprehensive encyclopedia article.
Learn about the formation, evolution and development of Earth, the third planet from the Sun, from 4.54 billion years ago to the present day. Explore the geological, biological and climatic changes that shaped the planet and its life forms across four eons and many eras.
Learn about the layers of Earth, from the crust and lithosphere to the core and mantle, and their chemical and mechanical properties. Find out how scientists use various methods to study the internal structure of Earth, such as seismology, gravimetry, and geochemistry.
Learn about the major geological events and processes that shaped Earth's past and present, from its formation 4.54 billion years ago to the present day. Explore the Precambrian, Phanerozoic and Cenozoic eons, and the continental cycles, ice ages and mass extinctions.
Earth science or geoscience is the study of the physical, chemical, and biological aspects of Earth and its atmosphere. It covers topics such as geology, geochemistry, geophysics, paleontology, mineralogy, petrology, plate tectonics, volcanoes, earthquakes, climate, and magnetism.
Nature is the inherent character or constitution of the physical world, including life. Learn about the origin, evolution, and features of the Earth, the only planet known to support life, and its geological processes and phenomena.
The atmosphere of Earth is a layer of gas mixture that surrounds the planet and provides various functions, such as shielding, heating, and supporting life. Learn about its composition, structure, properties, evolution, and effects on Wikipedia.
Land is the solid terrestrial surface of Earth not submerged by water, and it includes continents and islands. Learn about the origin, evolution, and characteristics of land, as well as its role in climate, biosphere, and human activity.