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Zimbabwe, officially the Republic of Zimbabwe, is a landlocked country located in Southeast Africa, between the Zambezi and Limpopo Rivers, bordered by South Africa to the south, Botswana to the south-west, Zambia to the north, and Mozambique to the east. The capital and largest city is Harare. The second-largest city is Bulawayo. A country of roughly 15 million people, Zimbabwe has 16 official languages, with English, Shona, and Ndebele the most common. It was once known as the “Jewel of Africa” for its great prosperity.

Zimbabwe first became a major trade route in the 11th century. Beginning in the 9th century, during its late iron age, the Gokomere, the Bantu people who would become the ethnic Shona, built the city-state of Great Zimbabwe, which was one of the major African trade centers, controlling the gold, ivory, and copper trades with the Swahili coast, which were connected to Arab and Indian states. By the mid-15th century, the city-state had been abandoned. From there, the Kingdom of Zimbabwe was established, followed by the Rozvi and Mutapa empires.

The British South Africa Company of Cecil Rhodes first demarcated the present territory during 1890 when they conquered Mashonaland and later in 1893 Matabeleland after a fierce resistance by Matabele people known as the First Matabele War. Company rule ended in 1923 with the establishment of Southern Rhodesia as a self-governing British colony. In 1965, the conservative white minority government unilaterally declared independence as Rhodesia. The state endured international isolation and a 15-year guerrilla war with black nationalist forces; this culminated in a peace agreement that established universal enfranchisement and de jure sovereignty as Zimbabwe in April 1980. Zimbabwe then joined the Commonwealth of Nations, from which it was suspended in 2002 for breaches of international law by its then-government under Robert Mugabe, and from which it withdrew in December 2003.

Robert Mugabe became Prime Minister of Zimbabwe in 1980 when his ZANU–PF party won the elections following the end of white minority rule; he was the President of Zimbabwe from 1987 until his resignation in 2017. Under Mugabe’s authoritarian regime, the state security apparatus dominated the country and was responsible for widespread human rights violations. From 2000 to 2009 the economy experienced decline and hyperinflation before rebounding after the use of currencies other than the Zimbabwean dollar was permitted, though growth has since faltered. On 15 November 2017, in the wake of over a year of protests against his government as well as Zimbabwe’s rapidly declining economy, Mugabe was placed under house arrest by the country’s national army in a coup d’état and eventually resigned six days later. Emmerson Mnangagwa has since served as Zimbabwe’s president.

Zimbabwe is a member of the United Nations, the Southern African Development Community (SADC), the African Union (AU), and the Common Market for Eastern and Southern Africa (COMESA). Wikipedia

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An image from Zimbabwe

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Salar de Uyuni (or “Salar de Tunupa”) is the world’s largest salt flat, or playa, at over 10,000 square kilometers (3,900 sq mi) in area. It is in the Daniel Campos Province in Potosí in southwest Bolivia, near the crest of the Andes at an elevation of 3,656 m (11,995 ft) above sea level.

The Salar was formed as a result of transformations between several prehistoric lakes that existed around forty thousand years ago but had all evaporated over time. It is now covered by a few meters of salt crust, which has an extraordinary flatness with the average elevation variations within one meter over the entire area of the Salar. The crust serves as a source of salt and covers a pool of brine, which is exceptionally rich in lithium. The large area, clear skies, and exceptional flatness of the surface make the Salar ideal for calibrating the altimeters of Earth observation satellites. Following rain, a thin layer of dead calm water transforms the flat into the world’s largest mirror, 129 km (80 mi) across.

The Salar serves as the major transport route across the Bolivian Altiplano and is a prime breeding ground for several species of flamingos. Salar de Uyuni is also a climatological transitional zone since the towering tropical cumulus congestus and cumulonimbus incus clouds that form in the eastern part of the salt flat during the summer cannot permeate beyond its drier western edges, near the Chilean border and the Atacama Desert.

Salar has been used as a filming location for movies such as Star Wars: The Last Jedi (2017; as planet Crait), The Fall (2006), Salt and Fire (2016), The Unseen (2017), and several others.

Salar de Uyuni is part of the Altiplano of Bolivia in South America. The Altiplano is a high plateau, which was formed during uplift of the Andes mountains. The plateau includes fresh and saltwater lakes as well as salt flats and is surrounded by mountains with no drainage outlets.

The geological history of the Salar is associated with a sequential transformation between several vast lakes. Some 30,000 to 42,000 years ago, the area was part of a giant prehistoric lake, Lake Minchin. Its age was estimated by radiocarbon dating shells from outcropping sediments and carbonate reefs and varies between reported studies. Lake Minchin (named after Juan B. Minchin of Oruro) later transformed into Paleo Lake Tauca having a maximal depth of 140 meters (460 ft), and an estimated age of 13,000 to 18,000 or 14,900 to 26,100 years, depending on the source. The youngest prehistoric lake was Coipasa, which was radiocarbon dated to 11,500 to 13,400 years ago. When it dried, it left behind two modern lakes, Poopó and Uru Uru, and two major salt deserts, Salar de Coipasa and the larger Salar de Uyuni. Salar de Uyuni spreads over 10,582 km², which is roughly 100 times the size of the Bonneville Salt Flats in the United States. Lake Poopó is a neighbor of the much larger Lake Titicaca. During the wet season, Titicaca overflows and discharges into Poopó, which in turn, floods Salar De Coipasa and Salar de Uyuni.

Lacustrine mud that is interbedded with salt and saturated with brine underlies the surface of Salar de Uyuni. The brine is a saturated solution of sodium chloride, lithium chloride, and magnesium chloride in water. It is covered with a solid salt crust varying in thickness between tens of centimeters and a few meters. The center of the Salar contains a few islands, which are the remains of the tops of ancient volcanoes submerged during the era of Lake Minchin. They include unusual and fragile coral-like structures and deposits that often consist of fossils and algae.

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An image from Salar De Uyuni Reflection

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