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  2. List of most-viewed YouTube videos - Wikipedia

    en.wikipedia.org/wiki/List_of_most-viewed...

    Shape of You " became the second video to reach four billion views in January 2019, [ 27 ] followed by "See You Again" in February 2019. [ 25 ] ". Baby Shark Dance " became the second video to reach five billion views in April 2020, [ 62 ] followed by "Shape of You" in October 2020.

  3. Lambda-CDM model - Wikipedia

    en.wikipedia.org/wiki/Lambda-CDM_model

    Astronomy portal. v. t. e. The Lambda-CDM, Lambda cold dark matter, or ΛCDM model is a mathematical model of the Big Bang theory with three major components: a cosmological constant, denoted by lambda (Λ), associated with dark energy. the postulated cold dark matter, denoted by CDM. ordinary matter. It is referred to as the standard model of ...

  4. Cosmological constant - Wikipedia

    en.wikipedia.org/wiki/Cosmological_constant

    t. e. In cosmology, the cosmological constant (usually denoted by the Greek capital letter lambda: Λ ), alternatively called Einstein's cosmological constant, is the constant coefficient of a term that Albert Einstein temporarily added to his field equations of general relativity. He later removed it; however, much later it was revived and ...

  5. List of most-subscribed YouTube channels - Wikipedia

    en.wikipedia.org/wiki/List_of_most-subscribed...

    American YouTube personality MrBeast is the most-subscribed channel on YouTube, with 310 million subscribers as of August 2024. A subscriber to a channel on the American video-sharing platform YouTube is a user who has chosen to receive the channel's content by clicking on that channel's "Subscribe" button, and each user's subscription feed ...

  6. ‘I hereby challenge you’: Suze Orman said you ... - AOL

    www.aol.com/finance/hereby-challenge-suze-orman...

    Interactive Brokers touts the largest electronic trading platform in the U.S. by number of daily average revenue trades and offers low commissions and margin rates, along with tools to find stocks ...

  7. Flatness problem - Wikipedia

    en.wikipedia.org/wiki/Flatness_problem

    Flatness problem. The local geometry of the universe is determined by whether the relative density Ω is less than, equal to or greater than 1. From top to bottom: a spherical universe with greater than critical density (Ω>1, k>0); a hyperbolic, underdense universe (Ω<1, k<0); and a flat universe with exactly the critical density (Ω=1, k=0 ...

  8. Why do bond prices move up and down? 3 key reasons - AOL

    www.aol.com/finance/why-bond-prices-move-down...

    3 key reasons bond prices move up and down. There are three primary factors that drive movements in bond prices: the movement of prevailing interest rates, the ability of the issuer to meet the ...

  9. Cosmic ray spallation - Wikipedia

    en.wikipedia.org/wiki/Cosmic_ray_spallation

    t. e. Cosmic ray spallation, also known as the x-process, is a set of naturally occurring nuclear reactions causing nucleosynthesis; it refers to the formation of chemical elements from the impact of cosmic rays on an object. Cosmic rays are highly energetic charged particles from beyond Earth, ranging from protons, alpha particles, and nuclei ...