The collar that allows your cat to 'talk' and other news

BBC Click's Nick Kwek looks at some of the best of the week's technology news, including the Australian entrepreneur who claims to be the inventor of virtual currency Bitcoin reneging on a promise to present new "proof" to support his case.

An artificial intelligence powered robot performs surgery on a pig's bowel and a collar which mixes cat meows with spoken phrases has been developed.

More at BBC.com/Click and @BBCClick.