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Understanding ancient life: how Martin Brasier changed the way we think about the fossil record

By
Jonathan B. Antcliffe
Jonathan B. Antcliffe
Department of Zoology, University of Oxford, Tinbergen Building, South Parks Road, Oxford OX1 3PS, UKOxford University Museum of Natural History, Parks Road, Oxford OX1 3PW, UK
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Alexander G. Liu
Alexander G. Liu
Department of Earth Sciences, University of Bristol, Life Sciences Building, 24 Tyndall Avenue, Bristol BS8 1TQ, UK
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Latha R. Menon
Latha R. Menon
Department of Earth Sciences, University of Oxford, South Parks Road, Oxford OX1 3AN, UK
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Duncan McIlroy
Duncan McIlroy
Department of Earth Sciences, Memorial University of Newfoundland, St John’s, NL, A1B 3X5, Canada
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Nicola McLoughlin
Nicola McLoughlin
Department of Geology, Rhodes University, Grahamstown, 6140, South AfricaAlbany Museum, Grahamstown, 6139, South Africa
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David Wacey
David Wacey
Department of Earth Sciences, University of Bristol, Life Sciences Building, 24 Tyndall Avenue, Bristol BS8 1TQ, UKCentre for Microscopy, Characterisation and Analysis, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
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Published:
January 01, 2017

Abstract

Crucial to our understanding of life on Earth is the ability to judge the validity of claims of very ancient ‘fossils’. Martin Brasier’s most important contribution to this debate was to establish a framework within which to discuss claims of the ‘oldest’ life. In particular, he made it clear that the burden of proof must fall on those making the claim of ancient life, not those refuting it. This led to his formulation of the concept of the continuum of morphologies produced by life and non-life and the considerable challenges of differentiating biogenesis from abiogenesis. Martin Brasier developed a set of criteria for distinguishing life from non-life and extended the use of many new high-resolution analytical techniques to palaeontological research. He was also renowned for his work on the Cambrian explosion and the origin of animals. Although he had spent much of his early career working on the geological context of these events, it was not until he returned to studying the Ediacaran and Cambrian periods in his later years that he began to apply this null hypothesis way of thinking to these other major transitions in the history of life. This led to him becoming involved in the development of a series of nested null hypotheses, his ‘cone of contention’, to analyse enigmatic fossils more generally. In short, Martin Brasier taught us how to formulate biological hypotheses in deep time, established the rules for how those hypotheses should be tested and championed a host of novel analytical techniques to gather the data required. As a consequence, future discussions of enigmatic specimens and very old fossils will be greatly enriched by his contributions.

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Contents

Geological Society

Earth System Evolution and Early Life: A Celebration of the Work of Martin Brasier

A. T. Brasier
A. T. Brasier
University of Aberdeen, UK
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D. McIlroy
D. McIlroy
Memorial University of Newfoundland, Canada
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N. McLoughlin
N. McLoughlin
Rhodes University, South Africa
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Geological Society of London
Volume
448
ISBN electronic:
9781786202932
Publication date:
January 01, 2017

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