This course was written by Simon Kelley.
Except for third party materials and otherwise stated (see Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence.), this content is made available under a
Course image: Alan Colson in Flickr made available under Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence.
The material acknowledged below is Proprietary and used under licence (not subject to Creative Commons Licence). Grateful acknowledgement is made to the following sources for permission to reproduce material in this course:
Figures 2, 10b: Peter Sheldon.
Figures 5, 7, 9, 10a, c, d, 11a, b, 14c, 15c, 17c, 19d, 29b, 30, 35, 36, 39, 43, 44, 45, 46, 50, 51, 53, 54, 57, 58, 59, 60, 61, 62, 63: Andy Tindle.
Figure 11: © Joel Arem/Science Photo Library.
Every effort has been made to contact copyright owners. If any have been inadvertently overlooked, the publishers will be pleased to make the necessary arrangements at the first opportunity.
Don't miss out:
If reading this text has inspired you to learn more, you may be interested in joining the millions of people who discover our free learning resources and qualifications by visiting The Open University - www.open.edu/ openlearn/ free-courses