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SUMMARY:Turing Patterns and Animal Markings - Ian Stewart FRS\, University
  of Warwick Mathematics Institute
DTSTART:20120619T173000Z
DTEND:20120619T183000Z
UID:TALK38210@talks.cam.ac.uk
CONTACT:Bjarki Holm
DESCRIPTION:In the early 1950s\, Alan Turing showed his colleagues a drawi
 ng with irregular black-and-white patches\, asking them whether they agree
 d that it looked like a cow. In 1952 he published ‘the chemical basis of
  morphogenesis’\, in which he proposed a mechanism for the creation of a
 nimal markings. A chemical called a morphogen was produced by local reacti
 ons and diffused across the embryo\, laying down a pre-pattern. At a late 
 stage of development\, this formed the basis of a pattern of pigments. Alt
 hough these reaction-diffusion equations do not correspond in detail to ma
 ny features of the biology\, the patterns that they naturally form are rem
 arkably similar to those found on many animals\, including irregular and c
 onvoluted stripes on fish and some intricate patterns on seashells. The ta
 lk will be an informal illustrated discussion of these Turing patterns\, f
 rom the point of view of modern theories of pattern formation 
LOCATION:Babbage Lecture Theater - New Museums Site
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