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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.
![The postoperative client supports an incision with a folded pillow when taking a deep breath and cou](https://biology-forums.com/gallery/47/medium_18099_26_09_12_4_42_16.jpeg)
![A physician is performing a colonoscopy on a client and viewing the internal structures of the colon](https://biology-forums.com/gallery/47/medium_18099_24_10_12_4_35_31.jpeg)