|
|
Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
![Forest fragments left by clear-cutting forest from the surrounding landscape have very different phy](https://biology-forums.com/gallery/47/medium_33_19_02_12_5_42_32_2064795.jpeg)
![Left: This web was woven by a 17-day-old spider, showing regular patterns. Right: This web was woven](https://biology-forums.com/gallery/47/medium_12359_03_04_12_3_07_11.jpeg)