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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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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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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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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

2006 Data:Top 25 Substances Involved in Human Exposures 2006 Data:Top 25 Substances Involved in Human Exposures
Good body mechanics when facing the table directly. A. Head and back in alignment. B. Legs and feet ... Good body mechanics when facing the table directly. A. Head and back in alignment. B. Legs and feet ...
Mobilize knuckles with figure-8s. Turn the hand so palm faces the table. Grasp the proximal phalange ... Mobilize knuckles with figure-8s. Turn the hand so palm faces the table. Grasp the proximal phalange ...
Facing the table, place one hand on the thigh and the other on the lower leg. Gently rock the leg ... Facing the table, place one hand on the thigh and the other on the lower leg. Gently rock the leg ...
According to Table 17.1, which will reduce water but not Mg2+? According to Table 17.1, which will reduce water but not Mg2+?
A hypothetical grid of data used in synteny testing A hypothetical grid of data used in synteny testing
Video: Predator- prey competition and symbiosis

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