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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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.
The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.
![A full-term pregnancy. Image illustrates position of the fetus and the structures associated with pr](https://biology-forums.com/gallery/47/medium_14755_28_08_12_1_48_05_82531516.jpeg)
![Bones do not allow the X-ray beam to pass through them, resulting in an image of the bones on the ...](https://biology-forums.com/gallery/47/medium_660366_13_03_17_1_49_41_268652497.jpeg)