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  2. Timeline of the COVID-19 pandemic - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the_COVID-19...

    The timeline of the COVID-19 pandemic lists the articles containing the chronology and epidemiology of SARS-CoV-2, [1] the virus that causes the coronavirus disease 2019 ( COVID-19) and is responsible for the COVID-19 pandemic . The first human cases of COVID-19 occurred in Wuhan, People's Republic of China, on or about 16 November 2019. [2]

  3. Saudi Arabia - Wikipedia

    en.wikipedia.org/wiki/Saudi_Arabia

    Saudi Arabia, [e] officially the Kingdom of Saudi Arabia ( KSA ), [f] is a country in West Asia and the Middle East. It covers the bulk of the Arabian Peninsula and has a land area of about 2150000 km 2 ( 830000 sq mi), making it the fifth-largest country in Asia and the largest in the Middle East.

  4. List of prime numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_prime_numbers

    This is a list of articles about prime numbers.A prime number (or prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. By Euclid's theorem, there are an infinite number of prime numbers.

  5. List of chemical elements - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_elements

    List of chemical elements. As of April 2024, 118 chemical elements have been identified and named officially by IUPAC. A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z ). [1]

  6. Internet - Wikipedia

    en.wikipedia.org/wiki/Internet

    The Internet (or internet) [a] is the global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) [b] to communicate between networks and devices. It is a network of networks that consists of private, public, academic, business, and government networks of local to global scope, linked by a broad array of ...

  7. Los Angeles - Wikipedia

    en.wikipedia.org/wiki/Los_Angeles

    Los Angeles, often referred to by its initials L.A., is the most populous city in the U.S. state of California.With roughly 3.9 million residents within the city limits as of 2020, Los Angeles is the second-most populous city in the United States, behind only New York City; it is also the commercial, financial and cultural center of Southern California.

  8. Japan - Wikipedia

    en.wikipedia.org/wiki/Japan

    Japan is a part of the Ring of Fire, and spans an archipelago of 14,125 islands, with the five main islands being Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa. Tokyo is the country's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto .

  9. List of presidents of the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_Presidents_of_the...

    Near the end of his presidency, Johnson rejoined the Democratic Party. [42] ^ Chester A. Arthur succeeded to the presidency upon the death of James A. Garfield. [47] ^ Theodore Roosevelt succeeded to the presidency upon the death of William McKinley. [52] ^ Calvin Coolidge succeeded to the presidency upon the death of Warren G. Harding.