You’ve probably heard of “extreme selfies” taken by people snapping photos of themselves in potentially dangerous locations and scenarios. There’s more than 9400 posts on Instagram with the hashtag #extremeselfie, and the trend has only accelerated with the advent of the selfie stick. A lot of these selfies are harmless hijinks, but there’s been a rash of media stories recently concerning people...

Many teens consider online bullying to be worse than face-to-face bullying, a survey of teenagers has found. After all, cyberbullying can happen around the clock, it’s relentless, and it’s driven by crowd behaviour – in fact, you can consider it a horrible manifestation of crowd-sourcing. The survey of 4720 teenagers around the world found that...