It's the world's biggest reference site Wikipedia's 10th anniversary.

Founder Jimmy Wales spoke to Louise Ridley about the future of Wikipedia and its relationship to scientific research: should students cite Wikipedia, what are the next big innovations in information sharing - and how often does he edit his own Wikipedia page?

Find out how our brand new iPad app works with the video tour. BBC Focus magazine's iPad app is out now - free access to digital issues of the magazine for print subscribers.

Focus's behind the scenes footage of Bang Goes The Theory's attempt to sail a boat made of ice to the Isle of Wight. Yes, you heard right. Made of ice.

Focus Art Editor Steve Sayers tests out the Hole-On Ex. A cardboard pinhole camera kit that you build yourself.