“The internet isn’t harming our love of ‘deep reading’, it’s cultivating it”

Heartbleed: don’t rush to update passwords, security experts warn

Internet security researchers say people should not rush to change their passwords after the discovery of a widespread “catastrophic” software flaw that could expose website user details to hackers.

Suggestions by Yahoo and the BBC that people should change their passwords at once – the typical reaction to a security breach – could make the problem worse if the web server hasn’t been updated to fix the flaw, says Mark Schloesser, a security researcher with Rapid7, based in Atlanta, Georgia. 

Tumblr, which is affected, issued a warning to its users on Tuesday night. Although the firm said it had “no evidence of any breach”, and has now fixed the issue on its servers, it recommends users take action. Full story

Social porn: why people are sharing their sex lives online

From PornTube to Pinsex to Pornostagram, sex websites are following the lead of social networks, allowing users to like, share, repost and comment on each other’s pornography. Read more

Photograph: Fabrice Lerouge/Getty Images/Onoky

How unemployed young people see the internet

When you’re unemployed, the world doesn’t look the same as it does for everybody else. Ads are taunting you, price tags are mocking you. If you have ever wondered why a jobless young person opens a seemingly harmless website and sighs, sobs or swears, read on – here’s what they’re seeing

Why the internet loves cats – not dogs

Cats rule the internet, but why? Other animals are cute and funny too. BuzzFeed’s ‘beastmaster’ runs through the theories. Read more

Photograph: Amanda Edwards/WireImage

"In five years’ time, all news articles will be a single coloured icon that fires out info-nuggets", writes Charlie Brooker

Photograph: David Levene for the Guardian

25 things you might not know about the web on its 25th birthday

It sprang from the brain of one man, Tim Berners-Lee, and is the fastest-growing communication medium of all time. A quarter-century on, we examine how the web has transformed our lives. Read more

Pictured: Briton Tim Berners-Lee, the inventor of the world wide web, at the opening ceremony of the London 2012 Olympic Games. Photograph: Wang Lili/xh/Xinhua Press/Corbis

What’s new, pussycat? The growing economy of internet cat videos

Grumpy Cat, Keyboard Cat and other felines are helping cats (and their owners) build careers on and off YouTube. Read more

Photograph: Amanda Edwards/WireImage

Meet the seven people who hold the keys to worldwide internet security

It sounds like the stuff of science fiction: seven keys, held by individuals from all over the world, that together control security at the core of the web. The reality is rather closer to The Office than The Matrix. Read more

Illustration: Aaron Tilley