1. How equal are your retweets? Thanks to Twee-Q, you can find out whether you retweet as many women as men. If you use Twitter and you care about gender equality in social media, this will make you think.
3. Astronaut Chris Hadfield recently had his last day on the International Space Station, after five months. To celebrate, he sang this awesome cover of David Bowie's Space Oddity. Check it out: