Thousands have abandoned their homes in northern NSW and hundreds of people rescued from floodwaters as the remnants of ex-tropical cyclone Debbie bore down, dumping a staggering amount of rain on the region.
Human societies and a multitude of species are going to be tested by climate change in ways that are barely understood, a new study finds.
If you're wondering why battery storage is still on the fringe of the energy debate in Australia, and also perhaps why power prices are high, just ask Tony Marxsen, the head of the country's energy markets.
The world is 33 months into its biggest recorded coral bleaching event with little sign of it ending, raising the prospect that coral mortality on the Great Barrier Reef will increase "significantly" from the quarter already lost in the past year, scientists say.
What if the biggest government announcement in electricity generation in years was both a great breakthrough and a distraction?
Two resignations from the board of the Climate Change Authority come with criticism of the Turnbull government.
Australia's original climate change-focused think-tank and lobby group will shut after it failed to replace the multi-million-dollar bequest it relied on.
As parts of Australia set heatwave records and the government considered building new coal-fired power stations, the vast continent to the south last week quietly marked a milestone.
After years of failed promises, Victoria is on the cusp of getting its first large-scale solar power stations.
Less than one dollar in a thousand spent on health in Australia goes to one of the biggest threats facing the sector, a new paper finds.
The creation of a long-mooted national park on Melbourne's fringe could create up to 750 jobs by turning the area into an eco-tourism hub, an analysis has found.
Sydney has marked its hottest ever month, with extended warm spells setting records at all metropolitan sites.
Victoria and NSW have been warned they could follow South Australia in being hit by electricity blackouts in years ahead unless Canberra comes up with a bipartisan national plan to deal with energy and climate change.
Energy giant lodges its long-delayed application to develop the controversial Narrabri coal seam gas project.
Claims of a cover-up as a plant lost for two centuries turns up on a development site.
Coal mining in Sydney's water catchment could prove an early test for new Premier Gladys Berejiklian
Do big investments in solar energy point to a different future for the oil-rich nations of the Middle East?
Have a spate of bites and sightings up and down the NSW coast raised the odds that an attack awaits beachgoers this summer? Peter Hannam investigates.
Australian customs officials destroyed two irreplaceable plant specimens that were being loaned to scientists by international institutions, prompting one of the institutions to suspend all transfers to Australian scientists.
Cyclone Donna has become the strongest May cyclone ever to hit the Southern Hemisphere
Canberra shivered through a freezing Monday morning but there was one silver lining.
Some of the world's biggest investors have pleaded with governments of the world's largest economies, including Australia, to stick with their commitments to tackle climate change and to introduce carbon pricing to help achieve them.
The little penguin may not have chosen to end up like this, but it got to experience something very few of its species ever taste: flight.
An out-of-season category three cyclone is bearing down on the Pacific nation.
Another branch has appeared in a huge crack on one of Antarctica's largest ice shelves, and scientists fear it's only a matter of time before a huge chunk - potentially containing 5000 square kilometres of ice - breaks away.
With storage prices dropping about 20 per cent a year, the attraction for cutting reliance on grid power is brightening fast.
Pollen-sensitive citizens listen up.
Sydney's mild autumn is set to extend well into May.
At least 10 people have been killed by tornadoes or flooding in the US South and Midwest with a rare late-season blizzard hitting western Kansas.
The warm and sunny weekend weather is set to continue for Sydney, as the week gets off to a bright start ahead of showers and cooler temperatures on Wednesday.
A six-month trial of surf nets on the state's north coast is coming to an end – with mixed results.
A herculean effort is under way to save the world's last population of a critically endangered fish found only in the middle of Queensland's most arid country.
Dachshunds dressed in harvest-themed attire roamed among the gourmet market stalls at the Bungendore Harvest Festival.
Westpac's decision to effectively rule out lending to the proposed giant Adani coal mine in Queensland has drawn praise from environmentalists but derision from the government and industry.
Temperatures in the capital slipped to minus 1.8Â degrees at 6:50am on Friday.
A cold snap is likely to give way to a milder few months ahead.
The wind farm will be NSW's largest once it is completed.
University of Canberra scientists are harnessing mobile phones to tap into frogs' conversations.
Maybe the hardened convicts who carved the 19th-century gravestones dotting this tiny Tasmanian island were barely literate, or perhaps one of them just had a wicked sense of humour. Schoolmaster Benjamin Horne went to his repose in 1843 with this sentence chiselled above his head: "Sincerely regretted by all who knew him."
He was healthy before the flight, the rabbit's breeder says.
Rising energy prices drive a huge surge of consumers and businesses installing solar panels.
A Kiama drone operator has told of his urgent efforts to raise the alarm after a shark made an unexpected appearance in his video, coming disturbingly close to unaware surfers.
The findings highlight the importance of keeping humpback "nursery" waters as quiet as possible, scientists say.
Autumn is likely to feel a lot like winter over the coming days - particularly in the evenings and early mornings.
Scientists in Australia are examining the possibility of enlarging and brightening the clouds around the Great Barrier Reef to save it from bleaching.
An earthquake of magnitude 6.9 has struck off the coast of Chile, rocking the capital Santiago and generating at least two significant aftershocks.
A bull shark caught off Swansea at Lake Macquarie has stirred up a social media storm, with a photo of the enormous aquatic predator quickly gaining notoriety.
Authorities closed the beach to swimming as crowds gathered on the sand to watch sharks hunt the schools of mullet.
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