World Cup 2014 Group AMexico’s Peralta finally sees off Cameroon after referee fluffs his linesThis was the second game of the World Cup and for the second game all the talk after the final whistle was about the referees. The main difference between this game and the opener between Croatia and Brazil less than 24 hours before, however, was that the decisions, in the end, did not influence the result.

My lesbian secret makes teenage life dreadful. Whom should I tell?Next week: My partner and his ex-wife swoop porn emails and have telephone sexI'm a 13-year-old girl who attends a single-sex grammar school. For almost a year now I have known that I am a lesbian. I have told no one about it. It makes me very uncomfortable when people laugh at homosexuals. My friends, I think, suspect. This secrecy is a constant source of anxiety to me.

The ObserverPhysicsInterviewPhysicist Sabine Hossenfelder: ‘There are quite a few areas where physics blurs into religion’Killian FoxTo answer life’s biggest questions, says the German theoretical physicist and YouTuber, we need to abandon unscientific ideas such as the multiverse Sabine Hossenfelder is a German theoretical physicist who writes books and runs a YouTube channel (with 618,000 subscribers at time of writing) called Science Without the Gobbledygook. Born in Frankfurt, she studied mathematics at the Goethe Universität and went on to focus on particle physics – her PhD explored the possibility that the Large Hadron Collider would produce microscopic black holes.

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PornographyAddiction to pornography has been blamed for erectile dysfunction, relationship issues and depression, yet problematic use is rising. Now therapists and tech companies are offering new solutions Thomas discovered pornography in the traditional way: at school. He remembers classmates talking about it in the playground and showing each other videos on their phones during sleepovers. He was 13 and thought it was “a laugh”. Then he began watching pornography alone on his tablet in his room.