Nobel prize season starts on Monday with speculation rife that the peace prize could go to US whistleblower Edward Snowden, Pakistani girls' education campaigner Malala Yousafzai, or perhaps Pope Francis.

Last year, the physics prize awarded to Peter Higgs and Francois Englert for the Higgs particle was widely predicted, but Nobel pundits and bookmakers tend to focus more on who will get the prestigious peace and literature awards.

This year saw a record 278 peace prize nominations and, while the list is secret, some names have been revealed by their sponsors, including US whistleblower Snowden, who was nominated by two Norwegian members of parliament.