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Did you know?
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.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Thyroid conditions may make getting pregnant impossible.
![Microscopic photo taken by Opportunity showing a gray hematite concretion, indicative of the past pr](https://biology-forums.com/gallery/47/medium_12359_30_06_12_4_45_58.jpeg)
![The Black Death spread over much of Europe in a three-year period in the middle of the fourteenth ce](https://biology-forums.com/gallery/47/medium_273688_23_02_15_7_45_11_208612424.jpeg)