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Real World: Longitude and Time Zones
1 min read

What determines how long a second, minute, or hour lasts? Learn about the development of the units of time and…

Apr 9, 2013
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Real World: What Time Is It In Space?
1 min read

The International Space Station, or ISS, orbits Earth once every 90 minutes. Learn how astronauts keep track of what time…

Aug 5, 2010
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