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... Science Frontiers ONLINE No. 85: Jan-Feb 1993 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Growth Spurts In Children Daily length measurements (in centimeters) versus age (in years) for a male infant showing growth spurts. Despite much anecdotal evidence and the convictions of many parents, biologists have not generally recognized the reality of short, sharp growth spurts on the order of 1 centimeter in a single 24hour period. Rather, the consensus has been that child growth was divided into three stages (infancy, childhood, adolescence), each characterized by different, but steady rates of growth. This conclusion was based upon annual and quarterly length measurements. However, when children are measured more often (weekly or daily), the growth ... is seen to be step-like rather than smooth, as in the accompanying illustration. Indeed, the mean amplitude of the growth spurts was found to be about 1 centimeter; and the duration of the spurts, about one day. These spurts punctuated long intervals of no growth. In infants, for example, 90-95% of their development is growth-free! (Lampl, M., et al; "Saltation and Stasis: A Model of Human Growth," Science, 258:801, 1992.) From Science Frontiers #85, JAN-FEB 1993 . 1993-2000 William R. Corliss ...
Terms matched: 2 - Score: 800 - 15 May 2017 - URL: /sf085/sf085b09.htm
... , the U.S . Navy began operating a 90-kilometer-long radio antenna stretching pole-to-pole through a Michigan forest. Broadcasting at only 76 hertz, this long antenna can communicate effectively with submerged submarines. Although the antenna produces electromagnetic fields about the same as those from a large household appliance, some of the trees adjacent to the antenna have enjoyed an unexpected spurt in growth, according to D. Reed and G. Mroz of the Michigan Technological University. "The researchers have been gathering data on the growth of trees since 1985, making measurements at two sites, one near the antenna and the other 50 kilometers away. The results seem to suggest that the electromagnetic field has a subtle influence on the forest. They found that two species of trees, northern ... In 1986, the U.S . Navy began operating a 90-kilometer-long radio antenna stretching pole-to-pole through a Michigan forest. Broadcasting at only 76 hertz, this long antenna can communicate effectively with submerged submarines. Although the antenna produces electromagnetic fields about the same as those from a large household appliance, some of the trees adjacent to the antenna have enjoyed an unexpected spurt in growth, according to D. Reed and G. Mroz of the Michigan Technological University. "The researchers have been gathering data on the growth of trees since 1985, making measurements at two sites, one near the antenna and the other 50 kilometers away. The results seem to suggest that the electromagnetic field has a subtle influence on the forest. They found that two species of trees ...
Terms matched: 2 - Score: 285 - 15 May 2017 - URL: /sf098/sf098b07.htm
... Science Frontiers ONLINE No. 111: May-Jun 1997 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Circaseptennial Rhythm In Ear Growth J. Verhulst and P. Onghena have carefully measured the ears of a sample of British men aged from 30 to 83 years. Every seven years, they discovered, the rate of ear growth peaked. In this finding, Verhulst and Onghena supported the contention of the Ancient Greeks that there is a seven-year rhythm in human development. (Anonymous; "Rhythmic Ear Growth...," Science News, 151:26, 1997. If you are skeptical about this item, the source cited is: British Medical Journal, December 21/28, 1996.) Cross reference. We have ... re-corded rhythmic growth spurts in child-ren in SF#85 and SF#86. A related phenomenon, extremely rapid growth, is cataloged under BHF27 in our Catalog: Humans II . Information on this volume is posted at here . From Science Frontiers #111, MAY-JUN 1997 . 1997-2000 William R. Corliss ...
Terms matched: 2 - Score: 279 - 15 May 2017 - URL: /sf111/sf111p04.htm
... ONLINE No. 85: Jan-Feb 1993 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Clams before columbus Europe's mystery people Astronomy Heavy traffic in near-earth space WHY INTELLIGENT LIFE NEEDS GIANT PLANETS Biology Biology's big bang Singing caterpillars The lures of mussels WHEN A BIRD IN THE HAND IS WORSE THAN TWO IN THE BUSH Growth spurts in children GEOMAGNETIC STORMS AND HUMAN HEALTH Our chemical brain Geology Biogeology Two tsumani tales Geophysics A PARADE OF SPINNING PHOSPHORESCENT WHEELS BALL LIGHTNING PUNCHES CIRCULAR HOLE IN WINDOW Unclassified Three views of mortality Electronic channeling ...
Terms matched: 2 - Score: 239 - 15 May 2017 - URL: /sf085/index.htm
