Are we living in an AI bubble?

Shares in some of the world's largest chip companies have fallen sharply on markets in the US and Asia as a sell-off in artificial intelligence-related stocks deepened. Is it a preview of what's to come? Also on the programme: a magnitude 7.1 earthquake has struck south-west Japan. We hear from someone who experienced it. Plus, Andy Burnham has promised to 'value the hard hat as much as the graduation cap.' An education minister explains what that entails. And what's the power of owning your worst review? We hear the bizarre story of the museum that went viral after it branded itself with its 1-star review: 'worst aquarium ever.'