OceanXplorer stretches the notion of what a ship can be. At 87 metres long, it holds two deep sea submersibles – one for scientists, the other for media – and laboratories lit up like film sets. The red carpet is rolled out when I visit the vessel in December, during the UN climate summit in Dubai. It’s docked down a guarded arm of the harbour, and has for days been hosting a stream of esteemed guests like Bill Gates and Jordanian royalty. This is the world’s most advanced media and research vessel, according to OceanX – a nonprofit arm of Dalio Philanthropies, which ‘furthers the diverse phil…