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One of the works on display at Earth and Sky:John Mawurndjul’s Mardayin ceremony 2000 (detail). Natural pigments on eucalyptus bark, 170 x 78 cm. Don Mitchell Bequest Fund 2000. Art Gallery of New South Wales, Sydney. © John Mawurndjul. Tarrawarra Museum of Art

Enthusiastic spirit: John Mawurndjul at Tarrawarra

Hetti Perkins has curated an exhibition of bark paintings by John Mawurndjul and Gulumbu Yunupingu that is currently on display at Tarrawarra Museum of Art. Who are these artists – and how have their lives shaped their artworks?
Amid the fanfare over the launch of the Powerwall, has Tesla’s Elon Musk struck a decisive blow for renewable energy? YouTube/Tesla Motors

The Tesla battery heralds the beginning of the end for fossil fuels

Tesla’s new home battery could help halve the costs of electricity for typical American households - all using existing technology. The fossil fuel industry is right to be worried.
Broadcaster Derryn Hinch is a prominent campaigner for US-style sex offender registries, but it is important to be aware of their limitations. AAP/Dan Peled

Sex offender registers don’t mean we can assume children are safe

Western Australia was the first state in the nation to allow public access to a sex offender register online. The public needs to understand how it works to avoid a false sense of security.
The Argo ocean profiling floats are part of a year-round monitoring network for the world’s oceans. Alicia Navidad/CSIRO

Ocean and climate research has come a long way in thirty years

In 1985, when CSIRO’s marine labs were launched, a seven-day weather forecast was little better than chance. Now, thanks to advances in our understanding of the oceans, our predictions are far better.
True Australians: hard workers, quiet achievers and generally underappreciated labourers.

Australia: riding on the insect’s back

Insects are largely hidden from view or maligned unfairly, but they make a tremendous contribution to the Australian economy.
Despite what the industry thinks, you shouldn’t judge a book by the size of its print run. Amelia Schmidt Follow

Small is beautiful: in praise of organic book publishing

Publishing is frequently a small-scale venture, comprising one or a handful of people with a vision for particular books they want to see published. Is it time to embrace ‘organic’ publishing?
In the 1980s, opposition to the death penalty imposed on political prisoners in Indonesia united Indonesians and citizens of countries around the world. from BOONROONG/www.shutterstock.com

Transnational campaign against death penalty in Indonesia began with political prisoners

While recent executions by Indonesia have captured the world’s attention, this year is also the 30th anniversary of the execution of political prisoners that first created global concern.
Manufacturing’s share of Australia’s gross domestic product has fallen from 12.9% in 1979 to 6.2%. Image sourced at www.shutterstock.com.au

Australia’s ‘five pillar economy’ - manufacturing

There is a future for manufacturing in Australia - but we need to follow some international lessons to build a competitive knowledge-based economy.
Treasury Secretary John Fraser now has plenty of company in calling for a ‘fundamental rethink’ of retirement income policy. AAP/Lukas Coch

Time to listen to the evidence for a rethink of super tax concessions

Over the last six months a public consensus has emerged among academics, think tanks, community organisations, elements of the superannuation industry and most politicians about superannuation.
Man in the middle: former Labor MP turned independent Billy Gordon (centre) is now one of three crucial cross-bench MPs in the Queensland parliament. Dan Peled/AAP

North Queensland’s powerful trio will shake up the state

Three north Queensland MPs representing just 3% of the state’s population will wield huge power in Queensland’s parliament when it resumes on Tuesday.
Is it too commonly assumed that racism is a major contributor to the problems of Indigenous Australia? Len Matthews

Racism towards Indigenous Australians: reporting the good with the bad

Can we trace modern-day racism against Indigenous Australians to the country’s British invaders? Often when trying to extinguish a fire, it is more important to know what sustains it rather than what started it.
Pope Francis and UN head Ban Ki-Moon, who met at the Vatican to discuss climate change, hope to influence this year’s crucial Paris climate talks. EPA/L'OSSERVATORE ROMANO/AAP

The Pope’s climate message will extend his advocacy for the poor

Pope Francis is set to release an encyclical on climate change next month, which he hopes will influence this year’s Paris climate talks as well as continuing his work on behalf of the world’s poorest.
While Microsoft, Google and Apple have had to answer questions in Canberra about whether they meet their tax obligations, their media activities seemingly defy regulation. AAP/Nikki Short

It’s time for Australians to rewind the media policy machine

Current regulations are a complete mismatch for today’s media practices and structures. While politicians shy from the debate, it’s time to heed public opinion and revisit the Finkelstein Report.
Repeated exposure to high levels of acid can cause tooth erosion. Joshua Hunter/Flickr

Health check: what’s eating your teeth?

Most of us know sugar is bad for teeth because it feeds bacteria that cause tooth decay. But fewer of us are aware that equally damaging is repeated exposure to acids in food and drinks.
Dramatic in its effect, Fly away Peter is a requiem to the fallen and damaged of the first world war. Photo: Zan Wimberley. Sydney Chamber Opera

Fly Away Peter on the opera stage is a masterful adaptation

One of the few Australian novels dealing with the first world war, David Malouf’s Fly Away Peter, has been adapted for the opera stage – and the Sydney Chamber Opera’s production is a great success.