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Editor's note
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Some pollies (anyone remember K-Rudd?) swear they only need three hours of sleep a night. Teenagers swear it’s literally impossible for them to get up in time for school because eight hours just isn’t enough. We’ve all heard we should get eight hours, but according to one of our experts, this convention only arrived with the industrial revolution (eight hours of work, eight hours of leisure, and eight hours of sleep) and isn’t backed up by science. We asked five experts if everyone really needs eight hours’ sleep every night, and five out of five said no. It depends on the person, and it changes as we age. So your teenager probably isn’t lying after all.
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Alexandra Hansen
Chief of Staff
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Top story
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How much sleep we need depends on us as individuals and varies by age.
from www.shutterstock.com
Alexandra Hansen, The Conversation
Five out of five experts agreed not everyone needs eight hours of sleep.
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Signs of life on Mars? These are the tracks of NASA’s Curiosity rover exploring the Martian landscape.
NASA/JPL-Caltech/MSSS
Paulo de Souza, CSIRO
Mars has long captured our imagination, from claims of canals to Martian attacks and now our latest NASA exploration to look inside the red planet.
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Kathleen Petyarre looking across Atnangker country, Northern Territory, December 2000.
Photograph Ian North; courtesy Wakefield Press
Christine Judith Nicholls, Flinders University
Petyarre, who won the Telstra prize for Indigenous art in 1996, has died in Alice Springs.
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Science + Technology
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Kieren Mitchell, University of Adelaide; Adrian Lister, Natural History Museum; Alan Cooper, University of Adelaide; Chris Turney, UNSW
The loss of the Siberian unicorn shows just how vulnerable some animals can be to environmental change that can impact on their food supply.
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Paulo de Souza, CSIRO
I've worked with NASA’s Mars Exploration Rover Project for 16 years. If you got yourself a ticket to Mars, here's how I'd advise you to prepare. And by the way, any mistake could kill you.
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Environment + Energy
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Stephen Garnett, Charles Darwin University; Alienor Chauvenet, Griffith University; April Reside, The University of Queensland; Brendan Wintle, University of Melbourne; David Lindenmayer, Australian National University; David M Watson, Charles Sturt University; Elisa Bayraktarov, The University of Queensland; Hayley Geyle, Charles Darwin University; Hugh Possingham, The University of Queensland; Ian Leiper, Charles Darwin University; James Watson, The University of Queensland; Jim Radford, La Trobe University; John Woinarski, Charles Darwin University; Les Christidis, Southern Cross University; Martine Maron, The University of Queensland; Molly K Grace, University of Oxford; Paul McDonald, University of New England; Sarah Legge, Australian National University
New research has shown how to measure conservation progress for Australia's 238 endangered bird species
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Frank Jotzo, Crawford School of Public Policy, Australian National University
The Labor Party's newly announced energy policy could finally set Australia's electricity sector on the path to a renewables-driven future. But policies are still needed to cut emissions elsewhere.
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Cities
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Neil Sipe, The University of Queensland; Dorina Pojani, The University of Queensland
Investment is pouring into urban technology, much of it into innovative ventures that aim to transform how we get around our cities.
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Politics + Society
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Alfred Allan, Edith Cowan University; Aimee-Rose Wrightson-Hester, Edith Cowan University; Maria Allan, Edith Cowan University
Nightclub-goers often regard the sort of sexually aggressive behaviour they witness as unacceptable, but they put up with it because it seems like lots of people – especially men – are doing it.
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Michelle Grattan, University of Canberra
The government now finds itself in the rather bizarre situation of having voted for a “national anti-corruption commission” without committing itself to one.
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Peter Saunders, UNSW
Education through to the end of high school is a birthright in Australia but many kids are missing out on important parts of that birthright in ways that leave them feeling like losers and outsiders.
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Michelle Grattan, University of Canberra
In a critique of federal influences in the rout of the Victorian Liberals, Ryan, a former vice-president of the state division, pointed to swings in seats “that are the cradle of the Liberal party”.
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Liz Campbell, Monash University
Australia's parliament will soon decide on a bill to try to regulate facial recognition technology, but it leaves a lot of questions unanswered.
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Business + Economy
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Paul Johnson, University of Western Australia
There are practical steps we can take right now to fix the banks. History suggests they'll never do it left to themselves.
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