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  1. 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.

  2. en.wikipedia.org › wiki › ParthenonParthenon - Wikipedia

    The Parthenon ( / ˈpɑːrθəˌnɒn, - nən /; Ancient Greek: Παρθενών, romanized : Parthenōn [par.tʰe.nɔ̌ːn]; Greek: Παρθενώνας, romanized : Parthenónas [parθeˈnonas]) is a former temple [6] [7] on the Athenian Acropolis, Greece, that was dedicated to the goddess Athena during the fifth century BC.

    • 447 BC
    • Classical
    • 73 by 34 m (240 by 112 ft)
    • Athens, Greece
  3. en.wikipedia.org › wiki › Bill_GatesBill Gates - Wikipedia

    Bill Gates. William Henry Gates III (born October 28, 1955) is an American businessman, investor, philanthropist, and writer best known for co-founding the software giant Microsoft, along with his childhood friend Paul Allen. During his career at Microsoft, Gates held the positions of chairman, chief executive officer (CEO), president, and ...

  4. en.wikipedia.org › wiki › TaiwanTaiwan - Wikipedia

    Taiwan,[II][k] officially the Republic of China (ROC),[I][l] is a country[27] in East Asia.[o] It is located at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the northeast, and the Philippines to the south. The territories controlled by the ...

  5. The Boeing CH-47 Chinook is a tandem-rotor helicopter originally developed by American rotorcraft company Vertol and now manufactured by Boeing Defense, Space & Security. The Chinook is a heavy-lift helicopter that is among the heaviest lifting Western helicopters.

  6. Fibonacci sequence. A tiling with squares whose side lengths are successive Fibonacci numbers: 1, 1, 2, 3, 5, 8, 13 and 21. In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn .

  7. en.wikipedia.org › wiki › Erg_ChebbiErg Chebbi - Wikipedia

    730 m (2,400 ft) Panorama showing the transition of flat desert to dunes. Erg Chebbi ( Arabic: عرق الشبي) is one of Morocco 's several ergs – large seas of dunes formed by wind-blown sand. It is located on the far western edge of the Sahara Desert. [1] There are several other ergs in Morocco, such as Erg Chigaga near M'hamid .

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