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Which measuring system is used in international track and field competitions?

Roger Bannister, a British physician, broke the four-minute mile in 1954. Will someone break the three-minute mile?

Is there a limit to the amount of time required to run a mile? If so, when do you think it will be reached?

 

Why are speeds on the 100-meter or 200-meter dashes reported in meters/second instead of kilometers per hour?

During World War II, American soldiers referred to kilometers as “kiddie miles.” Where do you think this name came from?

Preying animals, such as the cheetah, lion, and hyena, run faster than most other animals. Why?

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