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Sydney has capped off a mostly mild autumn with a cold snap that made it feel like winter has landed a tad early.

Platypus numbers across southern Australia are dropping due to loss of habitat, traps and pollution.

A new theory challenges mainstream thought about beauty's hand in evolution.

The Turnbull government to allow green bank to invest in carbon capture and storage.

• ANALYSIS

Getting the green bank to invest in carbon reduction measures is not entirely mad.

BeardsOn for Conservation, an Australian charity, is calling on men to grow a beard and then cut half of it off to raise awareness about worldwide deforestation this winter.

Perisher will open one week ahead of the snow season after dumps of 20cm across the valley.

Sydney's mild autumn spell has given way to a blast of frost and sub-zero temperatures overnight.

Australia's clean energy sector is heading for a record year for new solar and wind farms, generating thousands of jobs in regional areas and bringing the 2020 Renewable Energy Target within range.

A zookeeper was killed in a 'freak accident' in a suspected tiger attack in an animal enclosure .

The man was enjoying an afternoon's fishing on his own when the shark 'joined him' in the boat.

Revealing rare species' habitat through scientific papers is making it easier for poachers to target them.

Sydney's Taronga Zoo is celebrating the birth of a male Asian elephant.

Prospects for the controversial Adani coal mine have dimmed further with the Queensland government saying it wants no role in any federal loan to support the project.

Global warming might affect how well we sleep at night.

The future of Adani's proposed multibillion-dollar Carmichael coal mine remains under a cloud even after Queensland declared it had settled on a royalty regime.

Some chilly mornings ahead but otherwise the scene is set for a pleasant start to winter.

Humans consider standing on one leg something best done in a yoga class. Flamingos, on the other hand, consider it the most comfortable sleeping position.

Public faith in the $3 billion coal seam gas field proposed by Santos is unlikely without independent monitoring of its environmental impacts, according to the head of planning at Narrabri Shire Council.

A poll finds almost half of residents near the proposed Hume Coal mine are strongly opposed to the project.

Reintroducing dingoes to areas from where humans have removed them could help control the feral red fox  that hunts native animals such as the bilby and wallaby.

The giant ice sheets of Antarctica are melting faster than previously estimated, placing low-lying areas of Sydney and similar exposed cities at risk by the turn of the century.

Taxpayers would pay tens of billions for Australia to meet targets under direct action policy.

Dugong calf numbers, wiped out on the Great Barrier Reef six years ago, have recovered and are thriving, new research has found.

The Berejiklian government will issue warnings of potential threats to electricity supplies from this summer after its review of February's heatwave found the power sector to be vulnerable.

Warning - distressing images: Activists say thousands of dogs are slaughtered at the festival each year.

The animal rose from the water, grabbed the girl by her dress and dragged her into the water, a video shows.

Sydney's unusually warm May looks set to continue with sunny dry conditions forecast for the rest of the week.