Word: nuclei
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...haven't had a meteorology class since middle school, a quick review of Weather 101: Colder air encourages precipitation, so when the temperature drops at high altitude, water naturally condenses out of the air. Clouds are formed when this moisture, suspended in tiny droplets or crystals, meets a condensation nuclei - small particles of dust or ice that are blown about the upper atmosphere. Without these small particles, clouds can't form...
...method of cloud-seeding used by the Chinese involves dosing the atmosphere with silver iodide, a chemical solution either dropped from planes or shot up from the ground. (Other methods use salt or dry ice.) The silver iodide particles supercharge cloud formation, as they act as excellent condensation nuclei. Once clouds form, they also start a positive feedback effect. As droplets freeze and are added to the cloud, they release their heat, creating an updraft which draws additional moisture from the ground into the atmosphere...
...part of the brain that takes over when we are frightened is called the amygdala. It's an ancient, almond-shaped mass of nuclei located deep within the brain's temporal lobes. The amygdala is designed to be wildly sensitive to certain things - for instance, anything uncontrollable and unfair (like a terrorist attack involving an airplane) - and remarkably forgiving toward other, far deadlier menaces that seem to be small in scale (car crashes) or involve less suffering (heart attacks...
...produces up to 10 times more message than normal," explains molecular biologist Paul Hagerman of the University of California at Davis, who together with wife Randi has received an NIH grant to study the disorder. Over time, messenger RNA--the substance that transcribes genes into proteins--accumulates in the nuclei of brain cells, eventually poisoning them...
...last major stops for love signals in the brain are the caudate nuclei, a pair of structures on either side of the head, each about the size of a shrimp. It's here that patterns and mundane habits, such as knowing how to type and drive a car, are stored. Motor skills like those can be hard to lose, thanks to the caudate nuclei's indelible memory. Apply the same permanence to love, and it's no wonder that early passion can gel so quickly into enduring commitment. The idea that even one primal part of the brain is involved...