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Cement (and the concretes made with it) are about to become carbon negative – absorbing more carbon that they produce.It will happen by mimicking nature – in this case, the process through which marine organisms build shells.John Mathews does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond the academic appointment above.The Conversation UK receives funding from Hefce, Hefcw, SAGE, SFC, RCUK, The Nuffield Foundation, The Ogden Trust, The Royal Society, The Wellcome Trust, Esmée Fairbairn Foundation and The Alliance for Useful Evidence, as well as sixty five university members.It's just one of the tricks that have been used to make the work a little more precise. I believe he has confused the use of index fossils with evolution.

The principle of faunal succession in the geologic record was established by direct observation as early as 1799 by William Smith.The Triceratops brow horn was excavated in May 2012 and stored at the Glendive Dinosaur and Fossil Museum.The Museum, which has since 2005 been in cooperation with the Paleochronology Group, a team of consultants in geology, paleontology, chemistry, engineering, and education, sent a sample of the outer portion of the Triceratops brow horn to Head of the Paleochronology Group Hugh Miller, at his request, in order to carry out Carbon-14 dating.Mr Miller sent the sample to the University of Georgia, Center for Applied Isotope Studies, for this purpose.The sample was divided at the lab into two fractions with the “bulk” or collagen break down products yielding an age of 33,570 ± 120 years and the carbonate fraction of bone bioapatite yielding an age of 41,010 ± 220 years [UGAMS-11752 & 11752a].

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