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Mars

Mars is the fourth planet from the Sun. It was formed approximately 4.5 billion years ago, is a terrestrial planet and is the second smallest of the Solar System's planets with a diameter of 6,779 km (4,212 mi). A Martian solar day (sol) is 24.5 hours and a Martian solar year is 1.88 Earth years (687 Earth days). Mars has two small and irregular natural satellites: Phobos and Deimos. Carbon dioxide is substantially present in Mars's polar ice caps and thin atmosphere. It has the highest mountain in the solar system, Olympus Mons, and the largest canyon, Valles Marineris. There are large annual temperature swings on the surface, between −78.5 °C (−109.3 °F) and 5.7 °C (42.3 °F) – similar to Earth's seasons. Due to its geological history, the possibility of past or present life on Mars remains of great scientific interest. Mars has been explored by uncrewed spacecraft and rovers, and is an attractive target for future human exploration missions. (This article is part of a featured topic: Solar System.)

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Aurora australis seen from Melbourne, Australia
Aurora australis seen from Melbourne, Australia

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May 14: Feast day of Saint Matthias (Catholicism); Independence Day in Israel (2024)

Monument to the Battle of Lewes
Monument to the Battle of Lewes
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Yacine Brahimi

The Armenian Genocide was the Ottoman government's systematic extermination of 1.5 million Armenians, most of whom were Ottoman citizens. It took place during and after World War I. Historians date the start to 24 April 1915, when the Ottoman authorities rounded up, arrested, and deported 235 to 270 Armenian intellectuals and community leaders from Constantinople (now Istanbul) to the region of Ankara. The majority of them were eventually murdered. The authorities carried out the genocide in two phases—the wholesale killing of the able-bodied male population through massacre and subjection of army conscripts to forced labour, followed by the deportation of women, children, the elderly, and the infirm on death marches leading to the Syrian Desert. Driven forward by military escorts, the deportees were deprived of food and water and subjected to periodic robbery, rape, and massacre.

This map shows the routes by which the government deported Armenians, and the largest massacre sites.

Photograph: Simo Räsänen

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