Frontiers of Biogeography the scientific journal of the International Biogeography Society Population sizes of Tyrannosaurus rex cannot be precisely estimated "We demand rigidly defined areas of doubt and uncertainty" / Douglas Adams, Hitchhiker's Guide to the Galaxy. "The earth itself is generally supposed to be about four and a half thousand million years old. These dates are incorrect. Medieval Jewish scholars put the date of the Creation at 3760 B.C. Greek Orthodox theologians put Creation

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... s far back as 5508 B.C. These suggestions are also incorrect. Archbishop James Usher... suggested that the Heaven and the Earth were created in 4004 B.C. One of his aides took the calculation further, and was able to announce triumphantly that the Earth was created on Sunday the 21st of October, 4004 B.C., at exactly 9:00 A.M., because God liked to get work done early in the morning while he was feeling fresh. This too was incorrect. By almost a quarter of an hour."; Neil Gaiman and Terry Pratchett; Good Omens.