|
|
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 most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.
All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.
![The tolerance of male lions towards the cubs varies. They are, however, generally more likely to sha](https://biology-forums.com/gallery/47/medium_27638_22_04_12_9_12_32.jpeg)
![Basic chemical structure and synthesis of catecholamines. The synthesis of norepinephrine occurs in ...](https://biology-forums.com/gallery/28/medium_482573_27_04_17_12_01_44_284381998.jpeg)