Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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The horizontal fraction bar was introduced by the Arabs.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
Golden Retriever gnawing a pig's foot
Cave in China
Wenda Gu, united nations—china monument: temple of heaven.