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The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

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Vaccines prevent between 2.5 and 4 million deaths every year.

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In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Extinction of species in the past. Extinction of species in the past.
Compared to a chimpanzee, the human newborn has relatively little room to spare as it passes through Compared to a chimpanzee, the human newborn has relatively little room to spare as it passes through
The comparative brain sizes of different species The comparative brain sizes of different species
A karyogram of the human chromosome set, showing the distinctive banding pattern of each chromosome. A karyogram of the human chromosome set, showing the distinctive banding pattern of each chromosome.
Organs of the human male reproductive system, their functions, and locations. Organs of the human male reproductive system, their functions, and locations.
Some skeletal differences between a knuckle-walking gorilla and a bipedal human Some skeletal differences between a knuckle-walking gorilla and a bipedal human
Video: Introduction to Sickle Cell Anemia

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