Measure It

23rd December 2008 44 mins Season 15 Episode 40

How do you weigh a whale? How does your speedometer work? Take a look at the five most common areas of measurement: distance, time, speed, weight, and temperature.

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Season 15 · Episode 41

Night

Some activities only occur when the world is dark; fishermen use lights to lure squid to their nets; finding night crawlers in Toronto; military night vision gear; police helicopter's Spectrolab spotlight; baseball stadium.

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