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Illustration of ritualised human sacrifice in traditional Hawaiian culture, as documented by the French explorer and artists Jaques Arago in 1819. Arago, Jacques. (1822). Promenade autour du monde: pendant les années 1817, 1818, 1819 et 1820, sur les corvettes du roi l’Uranie et la Physicienne, commandées par M. Freycinet

Why did early human societies practice violent human sacrifice?

Human sacrifice seems horrifying and costly. But there might be a reason so many early human societies practiced it.
Easy tips on how to disconnect from social media and connect with the real world. Shutterstock/Photographee.eu

Addicted to social media? Try an e-fasting plan

Many of us are becoming addicted to social media, and it’s having a negative impact on our lives. Here are some tips to help you take back control.
The Division video games uses eye tracking technology to help target the enemy. Tobii EyeX/YouTube screengrab

How eye tracking gives players a new experience in video games

The ability to track where you are looking on screen opens up new options for video game players and developers. But is eye-tracking technology a gimmick or a game changer for the gaming industry?
A robot for an MP – who’d vote for that? Shutterstock/Mombo

Can we replace politicians with robots?

If a machine can write a speech for a politician, why not go the next step and replace the elected human with a programmed robot?
Hawthorn Hawks played better than expected in 2015 and beat the West Coast Eagles in the AFL Grand Final at the MCG. AAP Image/Julian Smith

Is winning all that matters in AFL or does the performance count?

The path to grand final victory in AFL can be paved with many wins and losses. But it’s measuring how a team plays against an expected result that can help them improve.
An artist’s illustration of Kappa Ceti whose stellar winds are 50 times stronger than our sun’s. Any Earth-like planet would need a magnetic field to protect its atmosphere if it was to stand a chance of hosting life. M. Weiss/CfA

What the ‘weather’ is like on a star can help in the search for life

In the search for life on other planets in the universe we need to find the right kind of star, and it needs to have the right kind of space weather.
Many people already use a second device when watching television, but can Netflix combine the two experiences? Shutterstock/ABB Photo

Double vision: why Netflix wants you to watch an extra screen

Many Australians already browse the web or send emails and messages to friends while watching television. Now Netflix wants to do what others have failed to do: combine both experiences in one app.
Consciousness might emerge from a particular kind of information processing. Shutterstock

What makes us conscious?

Consciousness is one of the most mysterious phenomena we know of. But evidence is emerging that it might just be a very special kind of information processing.
Gun control activists rally in front of the White House in Washington DC, earlier this year. REUTERS/Carlos Barria

Gun control in America by the right (and wrong) numbers

All sides in the debate on gun control in the United States are quick to point to numbers they say back their arguments. But are they playing fair with those figures?