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In 1864, the first barbiturate (barbituric acid) was synthesized.

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Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

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The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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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.

Species richness increases with island size. Species richness increases with island size.
Male cheetah marking territory Male cheetah marking territory
Chimpanzees and horses have brains that are similar in size. Chimpanzees and horses have brains that are similar in size.
The side injector combines with the shape of the piston to create a swirl as the piston moves up ... The side injector combines with the shape of the piston to create a swirl as the piston moves up ...
Environmental Issues Environmental Issues
Apply the cold source, and ask for immediate feedback. Conform the cold source to the shape of the ... Apply the cold source, and ask for immediate feedback. Conform the cold source to the shape of the ...
Video: Transferring genes into plants Animation

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