Did You Know – 03/18/2013


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1. The hyoid bone in your throat is the only bone in your body not attached to any other. The hyoid is anchored by muscles from the anterior, posterior and inferior directions, and aids in tongue movement and swallowing.
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2. 30% increase in the risk of depression for the people who drink four or more cans of soft drink a day.
10% decrease in the risk of depression for the people who drink four cups of coffee a day.

Source: US national institutes of health

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3. Tetrachromacy is the ability to see light from four distinct sources. An example of this in the animal kingdom is the zebrafish (Danio rerio), which can see light from the red, green, blue, and ultraviolet sections of the light spectrum. True tetrachromacy in humans is much rarer.

Humans are normally trichromats, having three types of cone cells that receive light from either the red, green, or blue part of the light spectrum. Each cone can pick up about 100 graduations of color and the brain combines colors and graduations so that there are about 1 million distinguishable hues coloring your world. A true tetrachromat with an extra type of cone between red and green (in the orange range) would, theoretically, be able to perceive 100 million colors.

Tetrachromacy is thought to be much more common in women than men – estimates range from 2 – 3% to 50% of women. Interestingly, colour-blindness in men (much more common than in women) may be inherited from women with tetrachromacy.
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4. Mothers Day was started by a woman named Anna Jarvis of Grafton, West Virginia. In 1907 Mrs. Jarvis began a cmpaign for the nationwide celebration of motherhood. At first no one paid much attention to her but gradually churches and local topwn organizations began inviting her to speak at their meetings. Soon her notions caught on throughout the country, and onMay 9, 1914 President Woodrow Wilson made the holiday official

“This woman, who died penniless in a sanitarium in a state of dementia, was a woman who could have profited from Mother’s Day if she wanted to,” Antolini said.

“But she railed against those who did, and it cost her everything, financially and physically.”

Interesting story

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5. Drinking too much water too quickly can lead to water intoxication. Water intoxication occurs when water dilutes the sodium level in the bloodstream and causes an imbalance of water in the brain. Water intoxication causes an electrolyte imbalance that affects concentrations of the ion sodium, and it leads to a condition called hyponatremia.
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