Crime has his own cycles, a magazine reported some years ago. Police records that were studied for five years from over 2,400 cities and towns show a surprising link between changes in the season and crime patterns, The pattern of crime has varied very little over a long period of years. Murder reaches its high during July and August, as do other violent attacks. Murder, moreover, is more than seasonal, it is a weekend crime. It is also a night-crime 62 percent of murders are committed(干，犯) between 6 p. m. and 6 Am. Unlike the summer high in crimes of bodily harm, robbing has a different cycle. You are most likely to be robbed between 6 p.m. and 2am. on a Saturday night in December, January, or February. The month with least crimes of all is in May except for one strange fact. More dog bites are reported in this month than in any other month of the year. Clearly our seasonal cycles of knowledge are completely different from our tendencies for crimes. Professor Huntington made extensive studies to discover the seasons when people read serious books, attend scientific meetings and get highest results on examinations. In all cases, he found a spring high and autumn high separated by a summer low. Possibly, high temperature and high humidity(湿度)cause our strange and violent summer actions, but police officials are not sure. 'There is, of course, no proof of a connection between humidity and murder,' they say,' Why murder's high time should come in the summer time we really don't know.' A good title of the passage would be ______.