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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

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Medication errors are three times higher among children and infants than with adults.

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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Peptic ulcer. A peptic ulcer may occur in the stomach (gastric ulcer), as shown here, or in the duod Peptic ulcer. A peptic ulcer may occur in the stomach (gastric ulcer), as shown here, or in the duod
Chronic Renal Failure Chronic Renal Failure
The effects of neonatal testosterone exposure on the size of the sexually dimorphic nuclei in male ... The effects of neonatal testosterone exposure on the size of the sexually dimorphic nuclei in male ...
Distribution of Thunderstorms: Approximately 14.5 million thunderstorms occur each year across the ... Distribution of Thunderstorms: Approximately 14.5 million thunderstorms occur each year across the ...
The fire triangle and the fire tetrahedron For combustion to occur, three elements must be ... The fire triangle and the fire tetrahedron For combustion to occur, three elements must be ...
Chronic Hunger Is Prevalent throughout the World Chronic Hunger Is Prevalent throughout the World
Video: Alternative Energy Sources

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