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The home biogas system offers a zero-emissions alternative to paying for fossil gas. Samuel Alexander

Home biogas: turning food waste into renewable energy

Australians love cooking with gas, but what if you could make your own supply, using leftover food waste? It may be time for more households to embrace home biogas – and stop paying gas bills.
A central convention of Greek mythological narratives called katabasis, the hero’s journey to the underworld or land of the dead. Marcella Cheng/The Conversation NY-BD-CC

Essays On Air: Journeys to the underworld – Greek myth, film and American anxiety

Journeys to the Underworld – Greek myth, film and American anxiety The Conversation36.9 MB (download)
Our new podcast, Essays On Air, features the most beautiful writing from Australian researchers. Today, classics expert Paul Salmond explores how modern cinema directors borrow from Greek legends.
The numbers of people travelling by air continue to grow. What are the ways to make it less unsustainable? Suhyeon Choi/unsplash

Sustainable shopping: is it possible to fly sustainably?

There’s really no such thing as truly sustainable air travel, but you can do some things to reduce your impact - such as flying with airlines with newer aircraft or taking a virtual holiday.
The storm intensified rapidly off the US east coast. NOAA/EPA

What are ‘bomb cyclones’? An expert explains what’s behind these intense winter storms

The US was hit by a ‘bomb cyclone’ last week, bringing icy cold and driving snow. These storms develop very rapidly, forming outside the tropics, typically on continental east coasts in winter.
Have our hopes of a drug treatment for dementia been dashed by drug company Pfizer giving up on research efforts? from www.shutterstock.com

Why a drug treatment for dementia has eluded us

Because we’re still not sure exactly what causes dementia, finding a treatment is difficult.
Talks between North and South Korea have led to the rogue North agreeing to send a delegation to the upcoming Winter Olympics in Pyeongchang. Reuters

The Winter Olympics and the two Koreas: how sport diplomacy could save the world

North Korea sending a delegation to this year’s Winter Olympics in South Korea may be a global shadow puppet show – or it might help thaw the frozen relations between the two countries.
Our first episode is from Paul Salmond, an expert on the Classics and Ancient History at La Trobe University, reading his essay ‘Journeys to the underworld – Greek myth, film and American anxiety’. Wes Mountain CC-BY-ND

Essays On Air: a new podcast from The Conversation bringing the best writing to you

Essays On Air 01: Introducing Essays On Air
The Conversation is launching a new podcast, Essays On Air. It's the audio version of our Friday essays, where we bring you the best and most beautiful writing from Australian researchers.
While digital footprints are considered to be a liability, if managed well they can be an asset. Shutterstock

Why children should be taught to build a positive online presence

When it comes to online spaces, children are usually taught about cyber safety and keeping information private, but curating a positive digital footprint could actually benefit them later in life.
A month into operation, the Tesla lithium-ion battery at Neoen wind farm in Hornsdale, South Australia is already providing essential grid services. REUTERS/Sonali Paul

A month in, Tesla’s SA battery is surpassing expectations

After a month of operation, the Tesla battery at Hornsdale Power Reserve in SA is outperforming expectations - and the model is set to be emulated in Victoria