Tweet, Retweet | featured news

The words "four more years", coupled with a photo of Barack and Michelle Obama embraced in a hug, have become the most retweeted Twitter post ever. The US president tweeted the message at 0416 GMT, and it has since been retweeted over half a million times. It underlined the now pivotal role social media plays in informing and persuading potential voters.

Everyone's made a joke they thought was funny only to see it fall flat, but Park Jung-geun's attempt at humor could see him jailed for up to seven years in South Korea. Park, a photographer by profession, re-tweeted some messages from North Korea's official twitter feed, such as reports on the late leader Kim Jong Il's travels across the country and negative tweets about South Korea.

At this point, a fair number of Twitter users have the new retweet feature enabled (and if you’re not one of them, don’t worry, the rollout continues).