|
|
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.
In 1864, the first barbiturate (barbituric acid) was synthesized.
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.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
![Layers are deposited parallel to Earth’s surface. Younger layers are deposited on top of older layer](https://biology-forums.com/gallery/47/medium_274477_04_02_15_12_24_28_205691492.jpeg)
![The Sleep/Waking Flip-Flop According to Saper et al. (2001), the major sleep-promoting region (the v](https://biology-forums.com/gallery/47/medium_334766_23_04_15_12_38_58_21472871.jpeg)