Japan’s World Expo touts unity, and algae, in turbulent times

World Expo opens on Sunday with host Japan aiming to bring humanity together, despite global turmoil and tepid public enthusiasm for the six-month event showcasing innovation as well as Hello Kitty in algae form.

A Mars meteorite the size of a sourdough loaf and a beating heart grown from stem cells are among the myriad futuristic attractions crammed into a vast waterfront site in Osaka hosting more than 160 countries, regions and organisations.

Most pavilions — each more outlandishly…