Day: January 6, 2022

The third planet from the Sun, Earth is home to life. It has the largest known body of liquid water in the Solar system, making it the only astronomical object with a hydrosphere. It is the most common type of hydrosphere, whereas others are rare. Despite their rarity, Earth is the most habitable planet in our Solar system, with about 7.3 billion people. It is the only planet with a large hydrosphere. The Earth’s mantle is more than 3,000 kilometers thick, starting thirty kilometers below the surface. It is composed […]