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Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
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The average office desk has 400 times more bacteria on it than a toilet.
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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
![A Dorsal view of a scan of the hand phalange of a child from Denisova that yielded mtDNA that differ](https://biology-forums.com/gallery/47/medium_273287_22_02_15_10_29_18_20802442.jpeg)
![The S-curve in the human vertebral column--a result of the evolution of bipedality--makes humans hig](https://biology-forums.com/gallery/47/medium_273688_23_02_15_7_45_09_20852677.jpeg)