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Every academic journal article is rigorously screened by other experts in the field. Shutterstock

Explainer: the ins and outs of peer review

Peer review is not infallible, but it’s central to how science works. In this extract from Peter Doherty’s new book, The Knowledge Wars, he explains how it works in practice.
It takes time for a human to become good at diagnosing ailments, but that learning is lost when they retire. Shutterstock/Poprotskiy Alexey

Digital diagnosis: intelligent machines do a better job than humans

Humans can only do so much when it comes to diagnosing what’s wrong with a patient. So why not let machines take over? They learn faster than humans and never retire.
This is what happens when science writing gets too turgid. Shutterstock

How not to write about science

Science can be fascinating and exciting. But much science writing is dull and obscure. Here are some of the tricks scientists often use to suck the joy out of science.
An artist’s reconstruction of what the giant bird Dromornis would look like. Genyornis would be similar but slightly smaller. Peter Trusler

A case of mistaken identity for Australia’s extinct big bird

Our entire knowledge of one of Australia’s extinct ancient giant birds is flawed because experts have been looking at remnants of the wrong egg the whole time.
Western governments are threatening to undermine the encryption that keeps our online communications private. Shutterstock

Governments undermining encryption will do more harm than good

An open letter signed by security experts from around the world is calling on governments to protect encryption rather than undermine it in a quixotic attempt to tackle terrorism.
The November 27 fireball as photographed by the Desert Fireball Network observatory at William Creek, South Australia. Desert Fireball Network

How to find a meteorite that’s fallen to Earth

It’s no easy task to find a meteorite that’s just been seen flashing across the sky. But it helps if you have an automatic network of “eyes” on the night sky.
View of Port Jackson, Fort Macquarie and part of Sydney Cove, in 1836. Govett, William Romaine/National Library

Charles Darwin’s evolutionary revelation in Australia

Charles Darwin visited Australia 180 years ago, and while here, he had a revelation that helped spark his insight into evolution by natural selection.
There’s already a lot you can say on Twitter in 140 characters. Flickr/Manuel Schmalstieg

What’s up with Twitter, in fewer than 10,000 characters

Much of the way people use Twitter has been determined by the users of the social media giant. So why all the upset at talk of allowing tweets beyond the current 140 character limit?