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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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The FDA recognizes 118 routes of administration.
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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
![Part of the Hubble Ultra-Deep Field image showing a typical section of space containing galaxies int](https://biology-forums.com/gallery/47/medium_12359_17_05_12_12_46_12.jpeg)
![(A) Figure illustrating the location and appearance of a peptic ulcer in both the stomach and the du](https://biology-forums.com/gallery/47/medium_14755_10_09_12_7_09_46_8476830.jpeg)