Since 1981, every Chinese citizen over 11 has been required to plant three to five trees per year.

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Dogs will sometimes fake being sick to get attention

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Twins can have different fathers - this phenomenon is called superfecundation.

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Firefighter suits can withstand temperatures up to 800 degrees.

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It is not uncommon for successful people to underestimate and devalue their own achievements, and even believe that their own success/competence/intelligence is fraudulent. This mindset is known as Impostor Syndrome.

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Nowadays the average high school kid today has the same level of anxiety as the average psychiatric patient in the early 1950's.

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Shoes smell bad? Put them in the freezer overnight. It will kill the bacteria and get rid of the stink.

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The type of music you listen to affects the way you perceive the world.

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Hawaii is moving towards Japan 4 inches every year.

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A "hobo" is a person who travels and finds work. A "tramp" is someone who travels but mostly does not work. A "bum" is someone who neither travels nor works.

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When you experience excitement, your thoughts trigger the pituitary gland to tell the adrenal glands to release adrenaline. This pulls blood to your lungs and muscles (to activate your fight-or-flight response) and away from your stomach. Boom! There are your butterflies.

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The United States Constitution is the only constitution from the 18th century that's still in use.

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A person undergoes a complete renewal every 7 years.

The human body is constantly in motion: shedding and regrowing skin, renewing lungs, growing new hair.

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Victoria Falls is one of the most famous waterfalls in the world, attracting thousands of tourists annually.

Its width is a whopping 1700 meters.

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Dolphins have their own names, and they recognize each other by these names.

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When young people are affected by grief, their immune system

becomes stronger. However, when older people experience grief, their immune system weakens. This may explain why many elderly couples pass away only a short time apart.

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If a Google employee dies, their spouse will receive half their pay for 10 years as well as stock benefits, and any children will receive $1000 a month until they turn 19.

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