In the U.S., all interstate highways that run east to west are even-numbered.

As of 2010, the tallest building in the world is the Burj Khalifa in Dubai, UAE. It reaches an incredible 828 metres (2717 feet) in height. Check out more building facts or our list of the tallest buildings in the world.

Dentists have recommended that a toothbrush be kept at least 6 feet (2 m) away from a toilet to avoid airborne particles resulting from the flush.

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