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THE lantern, or light organ, of a particular Photuris firefly is covered with jagged scales that dramatically enhance the brightness of the light that the insect produces.   * Jagged scales Consider: Researchers have found that tiny scales on the lantern surface of some fireflies form a corrugated pattern, somewhat like overlapping shingles or tiles. The scales tilt up at one end by just 3 micrometers —less than one twentieth the thickness of a human hair. Yet this tiny tilt lets the lantern shine almost 50 percent more brightly than it would if the scales formed an even surface!

  Fats and oils Since most of the calories from ketogenic diets come from dietary fats, you should pick your food carefully. Most people can’t tolerate bigger amounts of vegetable oil, mayonnaise and olive oil over time, which is a good thing, as vegetable oils are rich in polyunsaturated omega-6 fatty acids. These fatty acids cause inflammation in the body and can be the main factor of many diseases if they’re your primary oil source. Cooking with them is not recommended as well.