|
|
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.
Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
There are more bacteria in your mouth than there are people in the world.
Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.
There are more nerve cells in one human brain than there are stars in the Milky Way.
![Jane Goodall pioneered the modern approach to studying primates in the wild, involving close-up obse](https://biology-forums.com/gallery/47/medium_269691_26_01_15_5_55_22_20430326.jpeg)
![Common skin signs are often evidence of an illness or disorder. A nodule is a larger papule; acne ...](https://biology-forums.com/gallery/47/medium_665046_01_03_17_6_26_25_26136243.jpeg)