Crispin Tickell Articles, essays, lectures and other writings
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Space objects

Vulnerable Earth: hits from space and other disasters - A lecture at the University of St Andrews, 2 May 2013.
Natural Disasters - a lecture at the Norman Lockyer Observatory, Sidmouth. 30 April 2011.
Natural disasters through the ages - a lecture given as part of the Mary Anning Weekend at Lyme Regis, 24 October 2010. "We tend to classify most sudden change as disastrous ... But without disasters we would not be here. The history of living organisms, so far as we know it from the fossil evidence, shows a pattern of relative evolutionary stability, punctuated by relatively sudden departures of some species and the arrivals of others. Few ecosystems or species last more than a few million years. Extinctions are an essential element in evolution."
Vulnerable earth (2) - the Miguel Aleman Foundation Lecture by Crispin Tickell, delivered in Mexico DF, 24 September 2007.
Vulnerable Earth - The Robert C. Barnard Environmental Lecture 2006. Delivered to the AAAS, Washington DC, 18 September 2006. "Our whole being is within a wafer-thin atmosphere surrounding the surface of a planet as it turns in space at exactly the right distance from the Sun for life. We are tiny parts of a system of life whose complexity passes, and always will pass, human understanding ... "
A peculiar honour - on the re-naming of minor planet "5971 Tickell" in recognition of Sir Crispin's work on the UK Government Task Force on Potentially Hazardous Near Earth Objects.
Catastrophes and global governance - Lecture to the Bristol Society. Bristol, 9 June 2004.
Near-Earth objects: risk, policies and actions - Notes for after-dinner talk to the OECD Global Science Forum workshop: Near-Earth objects: risk, policies and actions, Frascati 20 January 2003 .
Catastrophes - the St Andrews Prize Lecture, Royal Institution, London. "It is well within our capabilities to improve prediction and take measures to mitigate catastrophes. Anything on a larger scale would require international effort and administrative skills which are at present lacking. Obviously human ability to cope would depend on the resilience and good health of society in general. A world riven by war and degradation could easily be overwhelmed. Much would depend on the abilities of individual governments to manage at least within the areas of their responsibility..."
Catastrophes from space: prospects for planetary defence - "While the probability of being killed by an asteroid impact is comparable to that of being killed by an aircraft accident, the main difference is that aircraft accidents kill small numbers of people with high probability while asteroid impacts kill huge numbers of people with low probability ... ". Lecture to the AGM of the Royal Geographical Society.

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