Loving Blue Planet? Go one better and take a real submarine trip to the deep

The new must-have accessory for cruise liners and luxury yachts is a bubble-shaped submersibleThe unknowable expanse of the oceans has become a little more familiar after Blue Planet II. Now it is set to become more familiar still to tourists with enough cash to spare.The BBC series is the most-watched show of 2017, with 14.1 million viewers tuning in for unseen wonders like cannibalistic Humboldt squid, methane belching from the ocean floor and an underwater lake of brine. Scenes like these are beyond the view of anyone except TV crews, scientists and explorers - but not for much longer. Submarine tourism is riding a wave of interest that is likely to swell as the series continues. Continue reading...