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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.