We now turn our attention to what the dating systems tell us about the age of the Earth. The most obvious constraint is the age of the oldest rocks. These have been dated at up to about four billion years. But actually only a very small portion of the Earth 's rocks are that old. From satellite data and other measurements we know that the Earth's surface is constantly rearranging itself little by little as Earth quakes occur. Such rearranging cannot occur without some of the Earth's surface disappearing under other parts of the Earth's surface, re-melting some of the rock. So it appears that none of the rocks have survived from the creation of the Earth without undergoing remelting, metamorphism, or erosion, and all we can say--from this line of evidence--is that the Earth appears to be at least as old as the four billion year old rocks. im 38 years old i have an 15 year old son and i have 12 tattoos and 2 piercings Acknowledgements : A number of members of the American Scientific Affiliation and other Christians involved in the sciences reviewed this paper and/or made contributions. The following people are sincerely thanked for their contributions to the first edition: Drs. Jeffery Greenberg and Stephen Moshier (Wheaton College), John Wiester (Westmont College), Dr. Davis Young (Calvin College), Dr. Elaine Kennedy (Loma Linda University), Steven Schimmrich (U. of Illinois), Dr. Kenneth VanDellen (Macomb Community College), Dr. Guillermo Gonzalez (U. Texas, Austin), Ronald Kneusel, and James Gruetzner (U. New Mexico). The second edition, likewise, was significantly improved through reviews by Carol Ann Hill, Hill Roberts, Professor Jeffrey Greenberg (Wheaton College), Ken Wohlgemuth, and Dr. Kenneth Van Dellen. I thank my wife Gwen, and children, Carson and Isaac, for supporting me in this work, and I thank God for giving us the intelligence to understand little bits and pieces of His amazing creation.