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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.
There are more nerve cells in one human brain than there are stars in the Milky Way.
There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.
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.
![The yellow-winged darter, Sympetrum flaveolum, is a dragonfly found in Europe and mid and Northern C](https://biology-forums.com/gallery/47/medium_12359_26_04_12_4_58_19.jpeg)
![This is what was found when removing an air filter from a vehicle that had a lack-of-power concern. ...](https://biology-forums.com/gallery/30/medium_548020_01_06_17_5_31_05_30155132.png)