1.The Titanic was the first ship to use the SOS signal.
2. The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.
3. The average person who stops smoking requires one hour less sleep a night.
4. Laughing lowers levels of stress hormones and strengthens the immune system. Six-year-olds laugh an average of 300 times a day. Adults only laugh 15 to 100 times a day.
5. The roar that we hear when we place a seashell next to our ear is not the ocean, but rather the sound of blood surging through the veins in the ear.
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