The last time we looked at the U-Boat Worx Nemo submersible, it was April 2020, strange days when every single person on Earth would have loved to torpedo deep down into the sea in search of purer ...

The allure is undeniable: The gleaming blue lagoon, sparkling in the sunshine, holds 9 million gallons of water, with vibrantly colored sea life just below the surface. Vivid yellow submarines glide ...