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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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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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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

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