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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Structure of a hair and its associated sebaceous gland. Structure of a hair and its associated sebaceous gland.
HEART STRUCTURE 1 HEART STRUCTURE 1
Structure of a complex of a type II DNA methylase with DNA Structure of a complex of a type II DNA methylase with DNA
Structure of a bacterial nucleoid, showing independent domains of supercoiling Structure of a bacterial nucleoid, showing independent domains of supercoiling
The elements of chromatin structure The elements of chromatin structure
The density of Pb(s) is 11.34 g/cm3. Pb(s) exists in the cubic-closest packed structure The density of Pb(s) is 11.34 g/cm3. Pb(s) exists in the cubic-closest packed structure
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