|
|
More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.
The average adult has about 21 square feet of skin.
Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
There are more nerve cells in one human brain than there are stars in the Milky Way.
![The Lion Gate of Mycenae (detail)â€â€Âtwo lionesses flank the central column, c. 1300 B](https://biology-forums.com/gallery/47/medium_27638_22_04_12_9_22_43.jpeg)
![The continents were not always in their present positions. The position of the continents is importa](https://biology-forums.com/gallery/47/medium_274477_04_02_15_12_24_34_205791994.jpeg)