The murder rate in the United States is about four times greater than in Japan. In Japan, no private citizen can buy a handgun legally.

The size of a red blood cell is 708 microns. This is equivalent to one millionth of a meter.

The largest individual flower on Earth is from a plant called Rafflesia arnoldii. Its flowers reach up to 1 metre (3 feet) in diameter and weigh around 10kg.

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