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  2. Doomsday Clock - Wikipedia

    en.wikipedia.org/wiki/Doomsday_Clock

    It has since been set backward 8 times and forward 17 times. The farthest time from midnight was 17 minutes in 1991, and the nearest is 90 seconds, set in January 2023. The Clock was moved to 150 seconds (2 minutes, 30 seconds) in 2017, then forward to 2 minutes to midnight in January 2018, and left unchanged in 2019. [6]

  3. Play clock - Wikipedia

    en.wikipedia.org/wiki/Play_clock

    A play clock, also called a delay-of-game timer, is a countdown clock intended to speed up the pace of the game in gridiron football.The offensive team must put the ball in play by either snapping the ball during a scrimmage down or kicking the ball during a free kick down before the time expires, or else they will be assessed a 5-yard delay of game (American football) or time count violation ...

  4. Shot clock - Wikipedia

    en.wikipedia.org/wiki/Shot_clock

    Women's collegiate basketball (at the time sanctioned by the Commission on Intercollegiate Athletics for Women) used a 30-second shot clock on an experimental basis in the 1969–70 season, officially adopting it for the 1970–71 season. [18] The NCAA specifies 20 seconds rather than 30 after stoppages where the ball is already in the frontcourt.

  5. 30 Seconds (game) - Wikipedia

    en.wikipedia.org/wiki/30_Seconds_(game)

    30 Seconds is a charades-like fast-paced general knowledge board game, created by Calie Esterhuyse and first published in South Africa in 1998. [ 1 ] The game is played with two or more teams of at least two players.

  6. Orders of magnitude (time) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(time)

    The smallest meaningful increment of time is the Planck time―the time light takes to traverse the Planck distance, many decimal orders of magnitude smaller than a second. [ 1 ] The largest realized amount of time, based on known scientific data, is the age of the universe , about 13.8 billion years—the time since the Big Bang as measured in ...

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  8. Time-out (sport) - Wikipedia

    en.wikipedia.org/wiki/Time-out_(sport)

    In beach volleyball, the Fédération Internationale de Volleyball (FIVB) stipulates one 30-second time-out allowed per team, per set. In FIVB World Competitions, there is an additional 30-second technical time-out in sets 1–2 when the sum of both scores is equal to 21. [10]

  9. Countdown - Wikipedia

    en.wikipedia.org/wiki/Countdown

    In the context of a rocket launch, the "L minus Time" is the physical time before launch, e.g. "L minus 3 minutes and 40 seconds". "T minus Time" is a system to mark points at which actions necessary for the launch are planned - this time stops and starts as various hold points are entered, and so doesn't show the actual time to launch.