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  2. Hourglass - Wikipedia

    en.wikipedia.org/wiki/Hourglass

    A winged hourglass as a literal depiction of the Latin phrase tempus fugit ("time flies") An hourglass (or sandglass, sand timer, or sand clock) is a device used to measure the passage of time. It comprises two glass bulbs connected vertically by a narrow neck that allows a regulated flow of a substance (historically sand) from the upper bulb ...

  3. Pencil detonator - Wikipedia

    en.wikipedia.org/wiki/Pencil_detonator

    The briefcase bomb used in the July 20 plot used a captured British pencil detonator inserted into a block of British plastic explosives weighing approximately two pounds. The bomb was set to 30 minutes and detonated as planned, but Hitler survived with minor injuries. Stauffenberg could not prepare the second block, though. He got rid of it ...

  4. Marine sandglass - Wikipedia

    en.wikipedia.org/wiki/Marine_sandglass

    A marine sandglass is a timepiece of simple design that is a relative of the common hourglass, a marine (nautical) instrument known since the 14th century (although reasonably presumed to be of very ancient use and origin). Sandglasses were used to measure the time at sea or on a given navigational course, in repeated measures of small time ...

  5. Time bomb - Wikipedia

    en.wikipedia.org/wiki/Time_bomb

    A time bomb (or a timebomb, time-bomb) is a bomb whose detonation is triggered by a timer. The use or attempted use of time bombs has been for various purposes including insurance fraud, terrorism, assassination, sabotage and warfare. They are a frequent plot device in thriller and action films as they offer a way of imparting a dramatic sense ...

  6. Boggle - Wikipedia

    en.wikipedia.org/wiki/Boggle

    One player begins the game by shaking a covered tray of 16 cubic dice, each with a different letter printed on each of its sides. The dice settle into a 4×4 tray so that only the top letter of each cube is visible. After they have settled into the tray, a three-minute sand timer is started and all players simultaneously begin the main phase of ...

  7. LGM-30 Minuteman - Wikipedia

    en.wikipedia.org/wiki/LGM-30_Minuteman

    LGM-30 Minuteman. Minuteman III launch from Vandenberg Space Force Base in California on 9 February 2023. The LGM-30 Minuteman is an American land-based intercontinental ballistic missile (ICBM) in service with the Air Force Global Strike Command. As of 2024, the LGM-30G (Version 3) [note 1] is the only land-based ICBM in service in the United ...

  8. Operation Hydra (1943) - Wikipedia

    en.wikipedia.org/wiki/Operation_Hydra_(1943)

    Operation Hydra was an attack by RAF Bomber Command on a German scientific research centre at Peenemünde on the night of 17/18 August 1943. Group Captain John Searby, commanding officer of No. 83 Squadron RAF, commanded the operation, the first time that Bomber Command used a master bomber to direct the attack of the main force.

  9. 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 ...