A female neriid fly (right) laying eggs, while her mate fights off a rival male. Angela Crean and Russell Bonduriansky. Credit: Author provided

By Angela Crean and Russell Bonduriansky

Naomi Klein: To fight climate change, we have to end capitalism. Mariusz Kubik, CC BY

By Matthew Nisbet, Northeastern University

Earth is “f---ed” and our insatiable growth economy is to blame. So argues Naomi Klein in her intentionally provocative best-seller This Changes Everything: Capitalism vs. the Climate.

Who doesn't want more brain power? Credit: James Steidl

By Elizabeth Maratos, University of Leicester

The practice of physically stimulating the brain in order to alleviate symptoms of illness and injury has been around since the early 20th century. For example, electroconvulsive therapy (ECT) is still used to alleviate symptoms of depression.

A close up of one of the hand stencils found in the prehistoric caves in Indonesia. Credit: Kinez Riza, Author provided

By Paul S.C.Taçon, Griffith University; Adam Brumm, Griffith University, and Maxime Aubert, Griffith University

Commotion outside house of infected nurse Teresa Ramos near Madrid. Credit: EPA

By Peter Barlow, Edinburgh Napier University

Violent rhetoric appeals to disaffected young men because it gives them a challenge to express aggression as 'proof' of manhood. Credit: Sillouetted children playing as soldiers/Shutterstock

By David Plummer, Griffith University

Recent coverage of counter-terrorism raids in Australia featured hard-core gyms, anabolic steroids, nightclub bouncers, gangs and weapons. Footage from the Middle East regularly depicts truckloads of young bearded warriors bristling with ordnance.