The City of Science Festival begins in Dublin today to coincide with a major European science convention that opens in the city next week.
The ten day festival will consist of over 60 Arts and Science events aimed at the general public.
Hundreds of leading international scientists will attend the Euroscience Open Forum, Europe's biggest science event.
It is held biannually and Dublin is the host this time.
There will be over 500 speakers and thousands of international scientists and policy makers as delegates.
Speakers include Nobel Laureates, the head of NASA, the head of CERN and many more.
They will explore and debate the big questions at the Convention centre but they will also move out into the city to participate in a wider festival of science which is open to all.
It includes science themed film festivals, theatre, tours, debates, workshops, and public talks.
The head of CERN Rolf Heuer will address a public meeting on the Higgs Boson.
The head of NASA will hold a public question and answer session with 400 Dublin children.
More information and tickets can be accessed online at dublinscience2012.ie.