Nose prints are used to identify dogs, much like humans use fingerprints.

The Pentagon has twice as many restrooms as necessary. When it was built, segregation was still in place in Virginia, so separate restrooms for blacks and whites were required by law.

Erosion at the base of Niagara Falls (USA) undermines the shale cliffs and as a result, the falls have receded approximately 7 miles over the last 10,000 years.

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