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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.
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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.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).
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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
The American paddlefish is poached for its eggs
Laboratory mice demonstrate that genetic differences can have profound effects on the propensity to
American soldiers advance past a burning oil well. As the routed Iraqi army fled Kuwait, it ignited ...
The remarkably complete skull of a 3-year-old Australopithecus girl; the fossil is 3.3 million ...
How to calculate the gain and loss gene numbers with low bootstrap of phylogenetic tree?
American Toad