The answer to your question involves some pretty complex chemistry, so I'm going to give just an overview. The color in plant foods comes from natural pigments. In general, chlorophyll provides green and blue-green; carotenoids provide orange, yellow, red and red-orange; and anthocyanins provide red, purple and various shades of blue. Individual pigments can differ considerably. One reason that there are so few naturally blue foods is that a combination of pigments is usually present in any given fruit or vegetable. Blue anthocyanins are chemically less stable than other pigments and are usually dominated by them. In order for the blue hue to predominate in the mix, it must have a slight shift in its chemical makeup. This is a rare occurrence. In the case of concord grapes, the mixture of anthocyanin pigments and the chemistry favors the blue hue. In other words, the blue pigment is there, the chemistry is right and you get a predominantly blue hue.
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I heard on the news that corn contributes to humidity in the summer. A friend of mine said that a farmer told her that is not true. Who's right?
Whoever told you that corn contributes to humidity in the summer -- is correct! Corn, like any other growing plant, releases moisture as a natural part of growth and life (transpiration). This release of moisture helps cool the plant. So, indeed, corn is releasing moisture all during its growing season, and hence is contributing moisture to the local moisture field -- which results in increased humidity, both in the field (below the corn "canopy") and in the surrounding area when this moisture is moved by local wind systems.
The general consensus is that the phrase originated hundreds of years ago. Theater folk were suspicious and superstitious types. Because their work as actors was to "practice the art of lying," they thought that if they wished a fellow actor good luck, the opposite would happen. Consequently, we say the reverse. The phrase "break a leg" is rumored to have begun because someone did just that after being wished good luck. Some have suggested that the practice came from "the evil eye," an eastern European idea that cautioned never to tempt fate by wishing for good luck.
This custom started in medieval times. The world was an unsavory place back then, and people often concealed weapons in their hands. The handshake was a way of affirming that neither you nor the person you were greeting was carrying anything intended to harm. Over time, it evolved into a polite greeting.
That distinction goes to Barack Obama who received 66.9 million votes in the 2008 election. Next in line is George W. Bush. In 2004, he won a second term with 62 million votes. Third in line is Ronald Reagan. In 1984, he won a second term with 54.5 million votes.
They stand for ante meridiem (before noon) and post meridiem (after noon).
Rime ice is essentially frozen fog. Super-cooled water droplets which are suspended in clouds when temperatures dip below freezing, will freeze instantly when they contact anything solid, such as a building, road sign, etc. The freezing droplets may form delicate, feather-like structures that coat the object in white.
Gelatin is one of the more common proteins, but it cannot be prepared from animal horns, hooves, lungs, muscle tissue, or blood. It is derived from collagen, which is the primary constituent of a white, fibrous connective tissue occurring in animals (in the form of cartilage, sinews, skin, and bone protein). Upon hydrolysis, collagen yields many products, including gelatin.