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Science Museum - Atomic Clocks - http://www.sciencemuseum.org.uk/onlinestuff/stories/atomic_clocks.aspx
Talks about how different types of atomic clocks work, and the history of their invention. |
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What Time Is It! - http://www.whattimeisit.com/
Gives the current time, synchronized by NIST. Close to 100 different time zones supported, as well as the ability to select the default time zone. |
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NPR : 'Seize the Daylight' - http://www.npr.org/templates/story/story.php?storyId=4572036
Talks about the complicated politics and curious history of daylight standard time. |
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The Hourglass - http://www.uh.edu/engines/epi1469.htm
The University of Houston College of engineering, describes how an hourglass works and also provides interesting facts about this timekeeper. |
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Making a Horizontal Sundial - http://www.lmsal.com/YPOP/Classroom/Lessons/Sundials/sundials.html
Learn how to make a sundial. Instructions are for beginners, intermediate, or advanced, and work for either the northern or southern hemispheres. |