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We focused our collection efforts on tiny pieces of these materials, along with reed and straw left by the ancient builders.In 1984 we conducted radiocarbon dating on material from Egyptian Old Kingdom monuments (financed by friends and supporters of the Edgar Cayce Foundation).We wanted to use science to test the accepted historical dates of several Old Kingdom monuments.

Libby reasoned that since the half-life of C years, the Djoser sample’s C14 concentration should be about 50% of the concentration found in living wood (for further details, see Arnold and Libby, 1949). Subsequent work with radiocarbon testing raised questions about the fluctuation of atmospheric C14 over time.The radioactive carbon isotope is no longer replenished; it only decays.Scientists have calculated the rate at which C14 decays.Ancient baking left deposits of ash and charcoal, which are very useful for dating.The 1995 set of radiocarbon dates tended to be 100 to 200 years older than the dates, which was about 200 years younger than our 1984 dates.

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Ramani Durvasula, a licensed clinical psychologist and professor of psychology at California State University, Los Angeles.“[I]f a woman agrees to have sex on the first date because she wants to, her partner may make unfair attributions about her (even after asking for sex) that she is not relationship material and may be of suboptimal moral character,” Durvasula told in an email.