The icebreakers have been invited to expand their use of Hobart as part of a push by the Tasmanian government to capitalise on China's growing interest in Antarctica.

Police say they have arrested 170 protesters in Newcastle Harbour for allegedly blocking the shipping channel during an anti-fossil fuel protest.

NSW Police say they've arrested 138 protesters in Newcastle Harbour for allegedly blocking the shipping channel in the world's largest coal port.

Laws that would force social media companies to police misinformation and outright lies on their platform have been formally abandoned by the federal government. Laws to restrict gambling advertising will also not proceed this year. 

Strata managers are responsible for a building's finances and insurance, as well as making sure the body corporate complies with legislation.