Red Headed Stepchild
(The Barrett family memoir of Navy Life)
by Sophie Ruth Meranski with photos


88-1360 Roxbury Latin Student Council 1947=1948
left to right-back row: - John Connors -Jim Gustavson, ....., John Corcoran, Peter Ulin, George Stebbins,Hamilton Pierce. Front Row: Frank Basius, David Wyman, Roger Sullivan, ...., John Barrett [sixth class] (R) futueart--Date: Fri, 21 Apr 2000 10:28:23 +0100 Your comment has been published on the History of the Universe web site. Your comment has been given the title Earlier end to Earth predicted Your comment was: There is another scenario that was published in NATURE Magazine in 1992 by Ken Caldeira and James Kasting of Pennsylvnnia State. They cite the faint early sun 1972 hypothesis of Carl Sagan- and cite literature suggesting sun is getting about ten per cent warmer every billion years, in the normal aging pattern of main sequence stars, as helium and heavy elements accumulate. Pressure of gravity causes hotter core temperatures, and nuclear reactions occur faster in a small core region. In a relatively short time - a hundred million years, researchers say the atmosphere will reach 50 C. or 120 F. , and most of the carbon dioxide will be fixed by chemical reaction with silicate rock, forming huge amount of limestone and dolomite. MOST PLANTS will be unable to continue photosynthesis, but the Pennsylvania State group found that certain tropical grasses that have "C4" metabolism can continue photosynthesis at very low levels of carbon dioxide in the atmosphere - ten parts per million. It is important we find ways to slow the warming of the sun. Around 120 million years ago the atmosphere had much higher levels of both oxygen and carbon dioxide. The high oxygen may have aided development of flight in birds. The decline in carbon dioxide especially last 20 million years has made grass dominate one third of earth's surface. Grass is the major source of human food - rice, wheat. corn, sugar, sorghum, millet, barley, oats, rye - and animal fodder. It was sent by John Barrett on 08 Apr 2000 This comment is published on the following page(s) Future of Earth( )
Subject: student council Roxbury latin(R)
Year: 1948