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The Coffee Ring Effect - Intriguing Microscopic Video

Penn physicists have recently shown that simply changing particle shape can eliminate the ring-shaped stain that is left behind when drops of certain liquids dry. In this video microscopy footage from their experiments, watch as spherical particles get swept to the edges, while oblong particles are distributed consistently.

59MAG's comment, July 31, 2014 12:43 AM
After 5 years of driking coffee every morning, Now I quite, the reasons? First, Coffee affects my stomach, I dont feel hungry. After taking a glass of coffee, my body is more tress like strong emotion than normal. I always feel hot several hours after drinking strong coffee, I would say, but the good things about coffee is making me more creative. So I dont think every one can drink coffee, I'ts depending upon the organisim of your body. I was addicted to coffee something like I cann't live a day without it. But no it's ok, and I feel more comfortable with other drink like fresh tea.
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[VIDEO] Incredible Inventions - Coffee

The first coffee houses recorded in Europe appeared in Venice in 1645, and in Oxford, England in 1650 after coffee came to Europe through trade with North Africa.

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