|
|
Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.
There are more nerve cells in one human brain than there are stars in the Milky Way.
Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.
Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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.
![Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones](https://biology-forums.com/gallery/47/medium_12359_26_01_13_3_56_27.jpeg)
![This cover of Life (1925) offered a stereotypical rendering of the new generation: a young couple ..](https://biology-forums.com/gallery/47/medium_568533_22_08_16_12_18_10_237182095.jpeg)