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Johor Bahru (Malaysian pronunciation: [ˈdʒohor ˈbahru]) is the capital of the state of Johor, Malaysia. It is located along the Straits of Johor at the southern end of Peninsular Malaysia. The city has a population of 663,307 within an area of 220 km2. Johor Bahru is adjacent to the city of Iskandar Puteri, both anchoring Malaysia's third largest urban agglomeration, Iskandar Malaysia, with a population of 1,638,219.Johor Bahru was founded in 1855 as Tanjung Puteri when the Sultanate of Johor came under the influence of Temenggong Daeng Ibrahim. The area was renamed "Johore Bahru" in 1862 and became the capital of the Sultanate when the Sultanate administration centre was moved there from Telok Blangah.
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Earth is the third planet from the Sun and the only astronomical object known to harbor life. About 29% of Earth's surface is land consisting of continents and islands. The remaining 71% is covered with water, mostly by oceans but also lakes, rivers and other fresh water, which together constitute the hydrosphere. Much of Earth's polar regions are covered in ice. Earth's outer layer is divided into several rigid tectonic plates that migrate across the surface over many millions of years. Earth's interior remains active with a solid iron inner core, a liquid outer core that generates Earth's magnetic field, and a convecting mantle that drives plate tectonics.
According to radiometric dating estimation and other evidence, Earth formed over 4.5 billion years ago. Within the first billion years of Earth's history, life appeared in the oceans and began to affect Earth's atmosphere and surface, leading to the proliferation of anaerobic and, later, aerobic organisms. Some geological evidence indicates that life may have arisen as early as 4.1 billion years ago. Since then, the combination of Earth's distance from the Sun, physical properties and geological history have allowed life to evolve and thrive. In the history of life on Earth, biodiversity has gone through long periods of expansion, occasionally punctuated by mass extinctions.