Blogs. Didn’t they disappear with the dodo?

Born some 15 years ago, blogs have played a key role in democratising news and opinion. But since the arrival of Facebook and Twitter, has writing a blog become rather antiquated? Why bother to blog when you’ve got the world that you’re interested in at your fingertips via your social networks? Or does the broad visibility a successful blog can provide still trump the potentially more fragmented nature of your social network reach? Or is there a metamorphosis under way which will breathe new life into the now venerable blog?