Elon Musk talks about networks of tunnel roads, autonomous driving, space travel and his pet snail Gary.
Amazon's new Echo Look device takes full length photos and offers advice on outfit choices.
British inventor says the project is just a bit of fun and safer than a motorbike.
The two tech firms have confirmed they were tricked out of $100m (£77m) in an alleged scam.
The Fori passenger ferry will now use electric power to make its river crossings.