Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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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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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
Major types of microbial cell shapes.
The Coronary Arteries and Major Veins of the Heart (Anterior and Inferior Views)
The Major Cleavage Patterns of Animal Embryos
Anatomical position of major neck structures
Major blood vessels of the human cardiovascular system