World's richest person Elon Musk made his first appearance at the World Economic Forum in Davos on Thursday, predicting robots will eventually outnumber humans and offering to solve human ageing. The Tesla and SpaceX chief spoke with BlackRock CEO Larry Fink in a change of tack for the tech billionaire who has previously dismissed the world's top annual political and business gathering as elitist and boring. Fink opened the session by instructing the audience to applaud more enthusiastically