It's an international neuroscience competition. Erm, basically you download this book of information called brain facts off the net, memorise it and then do a test. The top so many people go to the state level, where there are individual and team competitions. Then the top person from each state goes to Nationals, and the winner there goes on to represent Australia in the international part.
I got to state level last year but I think they changed it to only year10s this year. It was really interesting, but there was a heck of a lot to memorise. Check out
www.abbc.edu.au but the book they used last year is from the society for neuroscience at
Society for Neuroscience - Brain Facts.
hope that helps, although I think they've changed it a bit since I was in it >___o