Police clash with “Occupy Melbourne” protestors on October 21, 2011 in Melbourne, Australia. Protesters and riot police clashed in Melbourne today after police, acting on a Melbourne City Council eviction order, attempted to break up the crowd of hundreds that had been positioned in City Square for a week. (Photo by Mark Dadswell/Getty Images)

Ten day old male Gorilla “Fataki” clings to his mother “Frala” during his media debut at Taronga Zoo June 4, 2003 in Sydney, Australia. Fataki was born on May 24, 2003 and was the fourth Gorilla to be born at Taronga Zoo since the opening of the Gorilla Forest in 1997. (Photo by Chris McGrath/Getty Images)

A Sumatran Tiger tears apart a wrapped Christmas present at Taronga Zoo on December 21, 2011 in Sydney, Australia. Animals received Christmas themed enrichment foods as part of the Zoo's regular program to encourage the animals to forage for food and help improve hunting abilities. (Photo by Brendon Thorne/Getty Images)

Volunteers stand and read the morning newspaper while “waiting for the bus” at Henley Beach on January 8, 2012 in Adelaide, Australia. Surrealist artist, Andrew Baines recruited 100 volunteers for this human installation, meant to illustrate corporate workers enjoying nature rather than waiting in a long queue for a trip to work. (Photo by Morne de Klerk/Getty Images)

Australian Motorcross rider and member of the Crusty Demons, Robbie Marshall jumps over a helicopter with rotating blades and a Formula 1 car at Avalon Airport on February 22, 2012 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)

Crowd members attempt to keep dry with umbrellas and ponchos prior to the 2012 Sydney Gay & Lesbian Mardi Gras Parade on March 3, 2012 in Sydney, Australia. (Photo by Brendon Thorne/Getty Images)

Women talk during a Slutwalk march for the right of women to wear what they want without harassment on May 28, 2011 in Melbourne, Australia. The Slutwalk began with a small protest in Toronto, Canada, when women marched against a policeman who claimed he was told women should “avoid dressing like sl*ts in order not to be victimized”. Slutwalks are scheduled for Adeleaide and Sydney as well as other cities in North America and Europe. (Photo by Scott Barbour/Getty Images)

Sydneysiders walk amongst tar figures placed in the CBD to raise awareness about the damage smoking causes to the body at Martin Place on June 30, 2011 in Sydney, Australia. Each of the tar figures represent the profile of smokers, from the casual weekend smoker to the one with a lifelong addiction. (Photo by Lisa Maree Williams/Getty Images)