approach to treating the mentally disturbed. Tuke's idea was that patients could learn self-control by caring for creatures weaker than themselves. This is an idea which has persisted. In New York, horses, cows, cats and dogs were recruited to heal soldiers who had been wounded during World War II. These animals comforted the traumatized and helped the battle-scarred to avoid becoming obsessed with their injuries. During the 1970's, scientific interest was rekindled by a study that had originally set out to examine the connection between social conditions and heart disease. Quite by chance, researchers discovered that the survival rate of people who owned a pet was significantly greater than those who didn't. At first, they treated these findings with suspicion, but the more research that was done, the more conclusive the proof became. People with pets really were living longer.
North America. The first Europeans observed sunflower cultivated in many places from southern Canada to Mexico. Sunflower was probably first introduced to Europe through Spain, and spread through Europe as a curiosity until it reached Russia where it was readily adapted. Selection for high oil in Russia began in 1860 and was largely responsible for increasing oil content from 28% to almost 50%. The high-oil lines from Russia were reintroduced into the U.S. after World War II, which rekindled interest in the crop. However, it was the discovery of the male-sterile and restorer gene system that made hybrids feasible and increased commercial interest in the crop. Production of sunflowers subsequently rose dramatically in the Great Plains states as marketers found new niches for the seeds as an oil crop, a birdseed crop, and as a human snack food. Production in these regions in the 1980s has declined mostly because of low prices, but also due to disease, insect and bird problems.
annaabi.ee 
