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Did you know?
Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
Illicit drug use costs the United States approximately $181 billion every year.
Did you know?
The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
Did you know?
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
![Creede, Colorado, circa 1890, a rough silver mining town that grew from 660 people in 1889 to over 1](https://biology-forums.com/gallery/47/medium_376063_22_08_15_11_31_04_223802300.jpeg)
![U.S. suburbs were once unplanned, rambling affairs that took irregular shapes as people moved away ...](https://biology-forums.com/gallery/28/medium_482573_20_04_17_1_40_00_28021450.png)