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21 小時前 · The Moon is Earth's only natural satellite. It orbits at an average distance of 384,400 km (238,900 mi), about 30 times the diameter of Earth. Over time Earth's gravity has caused tidal locking, causing the same side of the Moon to always face Earth. Because of this, the lunar day and the lunar month are the same length, at 29.5 Earth days ...
4 天前 · The Greek alphabet has been used to write the Greek language since the late 9th or early 8th century BC. It is derived from the earlier Phoenician alphabet, and was the earliest known alphabetic script to have distinct letters for vowels as well as consonants.In Archaic and early Classical times, the Greek alphabet existed in many local variants, but, by the end of the 4th century BC, the ...
2 天前 · The University of Chicago. / 41.78972°N 87.59972°W / 41.78972; -87.59972. The University of Chicago ( UChicago, Chicago, U of C, or UChi) [10] is a private research university in Chicago, Illinois. The university has its main campus in Chicago's Hyde Park neighborhood. [11] [12]
3 天前 · Travel visa. A United States visa issued in 2014. A visa (from Latin charta visa 'paper that has been seen') [1] is a conditional authorization granted by a polity to a foreigner that allows them to enter, remain within, or leave its territory. Visas typically include limits on the duration of the foreigner's stay, areas within the country they ...
2 天前 · On 19 November 2021, scientists at the Botswana Harvard HIV Reference Laboratory (BHHRL) first discovered the variant Omicron subsequently designated B.1.1.529, and then named "Omicron" becoming the first country in the world to discover the variant.
3 天前 · Existentialism is a form of philosophical inquiry that explores the issue of human existence. Existentialist philosophers explore questions related to the meaning, purpose, and value of human existence. Common concepts in existentialist thought include existential crisis, dread, and anxiety in the face of an absurd world and free will, as well as authenticity, courage, and virtue.
2 天前 · Due to an increase of cases of the Omicron variant of COVID-19 in New York City, Phish postponed their 2021 New Year's Eve concerts at Madison Square Garden from December 2021 to April 2022. [231] [232] In lieu of the traditional New Year's Eve concert, Phish instead performed a three set New Year's Eve concert on December 31, 2021 from a soundstage they dubbed "The Ninth Cube".
