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  2. Doomsday Clock - Wikipedia

    en.wikipedia.org/wiki/Doomsday_Clock

    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. [ 5 ]

  3. Doomsday clock moves to 90 seconds to midnight – the ... - AOL

    www.aol.com/doomsday-clock-moves-90-seconds...

    The Doomsday Clock has moved closer to midnight than it has ever been, and is now just 90 seconds away from striking 12, scientists have said. The clock, a symbolic timepiece showing how close the ...

  4. Moment (unit) - Wikipedia

    en.wikipedia.org/wiki/Moment_(unit)

    A moment (momentum) is a medieval unit of time. The movement of a shadow on a sundial covered 40 moments in a solar hour, a twelfth of the period between sunrise and sunset. The length of a solar hour depended on the length of the day, which, in turn, varied with the season. [1] Although the length of a moment in modern seconds was therefore ...

  5. Shot clock - Wikipedia

    en.wikipedia.org/wiki/Shot_clock

    The set amount of time for a shot clock in basketball is 24–35 seconds, depending on the league. This clock reveals how much time a team may possess the ball before attempting to score a field goal. It may be colloquially known as the 24-second clock, particularly in the NBA and other leagues where that is the duration of the shot clock. If ...

  6. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    History of timekeeping devices. A marine sandglass. It is related to the hourglass, nowadays often used symbolically to represent the concept of time. The history of timekeeping devices dates back to when ancient civilizations first observed astronomical bodies as they moved across the sky. Devices and methods for keeping time have gradually ...

  7. Leap second - Wikipedia

    en.wikipedia.org/wiki/Leap_second

    Screenshot of the UTC clock from time.gov during the leap second on 31 December 2016.. A leap second is a one-second adjustment that is occasionally applied to Coordinated Universal Time (UTC), to accommodate the difference between precise time (International Atomic Time (TAI), as measured by atomic clocks) and imprecise observed solar time (), which varies due to irregularities and long-term ...

  8. Time dilation - Wikipedia

    en.wikipedia.org/wiki/Time_dilation

    Time dilation. Time dilation is the difference in elapsed time as measured by two clocks, either because of a relative velocity between them (special relativity), or a difference in gravitational potential between their locations (general relativity). When unspecified, "time dilation" usually refers to the effect due to velocity.

  9. BBC News Summary - Wikipedia

    en.wikipedia.org/wiki/BBC_News_Summary

    During this time Riz Lateef and Celina Hinchcliffe presented the update, while others including Sophie Long and Luisa Baldini also appeared. On 21 April 2008 the summary got a new logo and graphics as part of a BBC News relaunch. In October 2008 Crisell returned to the update. Riz Lateef became the new Friday and relief presenter.

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