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  2. Big Bang - Wikipedia

    en.wikipedia.org/wiki/Big_Bang

    The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. [1] The concept of an expanding universe was scientifically originated by physicist Alexander Friedmann in 1922 with the mathematical derivation of the Friedmann equations.

  3. Health savings account - Wikipedia

    en.wikipedia.org/wiki/Health_savings_account

    A health savings account (HSA) is a tax-advantaged medical savings account available to taxpayers in the United States who are enrolled in a high-deductible health plan (HDHP). [ 1 ] [ 2 ] The funds contributed to an account are not subject to federal income tax at the time of deposit. [ 3 ]

  4. The Big Bang Theory - Wikipedia

    en.wikipedia.org/wiki/The_Big_Bang_Theory

    The Big Bang Theory started off slowly in the ratings, failing to make the top 50 in its first season (ranking 68th), and ranking 40th in its second season. When the third season premiered on September 21, 2009, however, The Big Bang Theory ranked as CBS's highest-rated show of that evening in the adults 18–49 demographic (4.6/10) along with ...

  5. History of the Big Bang theory - Wikipedia

    en.wikipedia.org/wiki/History_of_the_Big_Bang_theory

    The history of the Big Bang theory began with the Big Bang's development from observations and theoretical considerations. Much of the theoretical work in cosmology now involves extensions and refinements to the basic Big Bang model. The theory itself was originally formalised by Father Georges Lemaître in 1927. [1]

  6. Chronology of the universe - Wikipedia

    en.wikipedia.org/wiki/Chronology_of_the_universe

    The chronology of the universe describes the history and future of the universe according to Big Bang cosmology.. Research published in 2015 estimates the earliest stages of the universe's existence as taking place 13.8 billion years ago, with an uncertainty of around 21 million years at the 68% confidence level.

  7. HSA Bank - Wikipedia

    en.wikipedia.org/wiki/HSA_Bank

    HSA Bank is a health savings account (HSA) administrator in the United States. Based in Milwaukee and Sheboygan, Wisconsin , the company focuses on the administration, service, and support of health accounts including Health Savings Accounts, Flexible Spending Accounts, and Health Reimbursement Arrangements.

  8. Timeline of the early universe - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the_early_universe

    The timeline of the universe begins with the Big Bang, 13.799 ± 0.021 billion years ago, [1] and follows the formation and subsequent evolution of the Universe up to the present day. Each era or age of the universe begins with an "epoch", a time of significant change. Times on this list are relative to the moment of the Big Bang.

  9. Big History - Wikipedia

    en.wikipedia.org/wiki/Big_History

    A diagram of the Big Bang expansion according to NASA Notable events from the Big Bang to the present day depicted in a spiral layout. Every billion years (Ga) is represented in 90 degrees of rotation. Big History is an academic discipline that examines history from the Big Bang to the present. Big History resists specialization and searches ...