Reindeer drink urine because salt is rare in their harsh climate. In fact, when Siberian sled masters want to gather their reindeer to hook up to the sled, they urinate to attract the reindeer.

The Hoover Dam, built along the Colorado River between 1931 and 1936 reaches 726 feet in height (221 metres). More interesting dam facts.

The company that manufactures the greatest number of women's dresses each year is Mattel. Barbie's got to wear something.

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