The secretive Pentagon research agency says the Liberty Lifter programme has proven the viability of building an amphibian ...

Next-generation amphibious aircraft will be powered by electric motors and hydrogen fuel cells, designed to reach remote ...

Is it a bird? Is it a plane? Or even a ship? No – it is something much more sinister. Roaring just feet above the sea, a sprawling shadow has emerged from the Bohai Sea, off the northern coast of ...