A revolutionary step in thinking occurred in the 17th century with Galileo and a telescope and then with Isaac Newton who showed scientific proof that the Earth revolved around the sunWhy Is Earth different from other planets? First, it is the only living planet that supports life as we know it. All corners of the earth are home to life, while the planets closest to Earth are considered dead and cannot host any form of life. A key observation about the planet's composition is simple: rock versus ice and gas. Venus and Mars are closest to the Sun, so they have high temperatures, while Jupiter and Saturn are further away - lower temperatures, which is why there is more gas and ice. The Earth has several distinct layers: the core is solid iron, even under intense heat, the pressure of the other layers makes it impossible for the heated iron to expand, so it remains solid. The next layer is the outer core and this is liquid iron. This leads to the mantle being partially liquid and where lava comes from when a volcano erupts. Finally, the crust is the thin upper layer where human-grade materials and minerals are found and mined
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