John O'Keefe, May-Britt Moser and Edvard I. Moser won the 2014 Nobel Prize in Physiology or Medicine for their discoveries of nerve cells that constitute a positioning system in the brain
© AP Photo/Bertil Ericson Photo: Edvard Moser and his wife May-Britt Moser in a laboratory in Trondheim, Norway 2008
© AP Photo/Geir Mogen, NTNU Photo: US Professor John O' Keefe, London, Britain, 06 October 2014
© EPA/FACUNDO ARRIZABALAGA The Nobel Prize in Chemistry has been awarded to Americans Eric Betzig and William Moerner and German scientist Stefan Hell for improving the resolution of optical microscopes
© AP Photo/Bertil Ericson Photo: Stefan Hell stands behind at the microscope he developed at the Max Planck Insitute in Goettingen, Germany, October 8, 2014
© AP Photo/Hubert Jelinek Photo: William Moerner in a lab at Stanford in Palo Alto, USA
© AP Photo/Stanford University, Linda A. Cicero Photo: Eric Betzig is applauded by students as he enters the auditorium at the Helmholtz center in Neuherberg, Germany, 08 October 2014
© EPA/ANDREAS GEBERT Isamu Akasaki, Hiroshi Amano and Shuji Nakamura won the 2014 Nobel Prize in Physics for discovering blue-light emitting diodes. Photo: Prof. Hiroshi Amano is being prepared for an interview with a Japanese television crew, Grenoble, France, October 08, 2014
© © AP Photo/Laurent Cipriani Photo: Meijo University Professor Isamu Akasaki receives a flower bouquet upon his arrival at the university the day following the Nobel Prize in Physics announcement in Nagoya, Japan, 08 October 2014
© © EPA/FRANCK ROBICHON Photo: professor Shuji Nakamura with a Blue Laser-LED, Santa Barbara, California, USA, 07 October 2014
© EPA/RANDALL LAMB / UNIVERSITY OF CAL Patrick Modiano of France won the 2014 Nobel Prize for Literature
© EPA/IAN LANGSDON Modiano's works centre on topics such as memory, loss of identity and guilt. His tales are often built on an autobiographical foundation or on events that took place during the German occupation of France in World War Two
© EPA/IAN LANGSDON Pakistani teenager Malala Yousafzai and Indian children's right campaigner Kailash Satyarthi won the 2014 Nobel Peace Prize. Photo: Malala Yousafzai of Pakistan poses with members of her family after delivering a statement after winning the Nobel Peace Prize in the Library of Birmingham in Birmingham in Britain, 10 October 2014
© EPA/FACUNDO ARRIZABALAGA Photo: Indian children's rights activist Kailash Satyarthi, New Delhi, India, October 10, 2014
© AP Photo/Bernat Armangue French economist Jean Tirole has been awarded the 2014 Nobel Economics Prize on 13 October. The academy said Tirole has made important theoretical research contributions in area of market power and regulation
© EPA/STEPHEN JAFFE/INTERNATIONAL MONETARY FUND/HANDOUT