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Earth is the third planet from the Sun and the only known planet to harbor life. It has a radius of 6,371 kilometers and is the fifth-largest planet in the Solar System. Earth consists of a central core, a viscous mantle, and a solid crust. It is unique for having liquid water on its surface, which is essential for life as we know it. P. Geo. Ricardo A Valls, M. Sc. and Geo Gadfly Valls Geoconsultant ORCID ID- https://orcid.org/0000-0002-5421-0914 Scopus Author ID: 7003369619/35335510700 ResearcherID: S-6604-2018 If you like this content, please "buy me a coffee" https://www.buymeacoffee.com/goldendroplets