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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
There are more nerve cells in one human brain than there are stars in the Milky Way.
According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.