But the evolutionists are clinging to the radio-activity theory desperately, an S.O.S. of a lost cause, depending, like evolution, on a great many assumptions, and unproven hypotheses. The assumption is that a radio-active substance, like uranium, “decays,” or passes into many other substances, of which radium is one, finally producing lead in 1,000,000,000 years or more. From this theory, Prof. Russell concludes that the earth is 4,000,000,000 to 8,000,000,000 years old, and the sun is older still. During this inconceivably long period, the sun was giving out as much heat as at present, which is 2,200,000,000 times as much as the earth receives. The heat of the sun can not be accounted for, by either the combustion or cooling off theory. By the commonly accepted contraction theory, the heat has been maintained only about 20,000,000 years. How could it have been sustained 4,000,000,000 to 8,000,000,000 years? Prof. Russell answers: “We must therefore _suppose_ that energy from an ‘unknown source’ becomes available at exceedingly high temperatures.... We can not do more than _guess_ where it is hidden.” Is this scientific? This theory, moreover, is interlocked with Einstein’s theory of Relativity, which holds that all energy has mass, and all mass is equivalent to energy. Although 2700 books have been written, pro and con, upon Einstein’s theory, yet he says only 12 men understand it, and a scientist retorts that Einstein can not be one of the 12. The contraction theory, the thickness of the cooled crust of the earth, and the conformation of its surface, all give mathematical proof that evolution is impossible because of lack of time. 11. GEOLOGY AND HISTORY