From August 10-18 around 2000 events will be held across the country to celebrate science and technology and the thousands of people who contribute to the world of knowledge.

There is also a national challenge which hopes to uncover the mystery of an 'aha' or eureka moment.

The research project is run by Simon Cropper, Margaret Webb and Daniel Little at the University of Melbourne School of Psychological Sciences.

The project aims to investigate the kind of sudden problem-solving insight that makes people spontaneously exclaim "yes" or "at last" or, indeed, "aha!" It has been dubbed the Aha! Challenge.