A fragment of a jawbone found in a cave in Somerset, UK, has revealed that dogs became man's best buddy 15,000 years ago. DNA analysis shows the jaw belonged to one of the earliest known domesticated dogs which suggest the friendship between the very first dogs and stone age humans was there almost from the very start. Originally from Kaikoura, Dr Lachie Scarsbrook is an evolutionary geneticist at the University of Oxford's Research Laboratory for Archaeology. He chats to Jesse.