With the revelation of this year´s Nobel Prize winners, the selections remain a hot topic.
A pioneer in fibre optics and two scientists who figured out how to turn light into electronic signals have been awarded the 2009 Nobel Prize for physics.
The 2009 Nobel prize for Chemistry has been awarded to three scientists for mapping out the protein-making factories within cells. Their work with ribosomes will be fundamental for the battle against bacterial infections.
Americans Elinor Ostrom and Oliver Williamson have won the Nobel prize for economics. The pair were rewarded for their analysis of the way authority is exercised in companies and economic systems.
Obama has expressed surprise over winning the 2009 Nobel Peace Prize. He told reporters about his determination in fighting a series of challenges facing humanity.
The Romanian-born German writer Herta Mueller has won the 2009 Nobel Prize in literature.