The saucer section would be a 0.3-mile-diameter (536-meter-diameter) rotating, magnetically suspended gravity wheel that would create 1G of gravity.

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Within a few minutes' walk of Meyer's home is Liulichang, Beijing's 750-meter (half-mile) antiques street which has flourished since the Yuan dynasty 800 years ago.

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The most popular distance - the sprint triathlon - is composed of a 500-meter swim, a 12-mile bike ride, and a 5k run.

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It has 100-meter wide swath of lava extending about 1 mile down its southeastern flank, according to the Alaska Volcano Observatory.

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The Hawaiian company Kona Blue raises a type of yellowtail from eggs to harvest in 3, 000 cubic-meter cages tethered to the sea floor, one-half mile off the coast of Kona.

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Most 800-meter runners are pushing themselves with every stride because sprinting a half-mile is a taxing, painful ordeal.

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The meter on top of the dash showed that the hour-long, 13-mile pass through congested Brooklyn, running the air-conditioner the entire time and being aggressive on the throttle, drained the battery by about 20 percent.

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