Planets with shells of diamond, others completely covered with water – the latest computer models predict some pretty strange worlds are lurking out there. And we could be on the verge of spotting them thanks to the latest planet hunting technology... 

War of words

For the past two decades, Klingon has been the movie language to learn. But now, Avatar’s Na’vi threatens to steal its crown. We’ve spoken to Klingon language creator Marc Okrand and Na’vi developer Paul Frommer to discover the secrets behind their success.

Your life online

Find out whether you should Google someone before a date, whether you can ‘borrow’ your neighbour’s Wi-Fi and whether cybersex is really cheating.

PLUS We reveal which gadgets will help you make the most of the World Cup, whether concentrating burns calories and whether men really do get more ill than women.