A new hypersonic jet prototype got everyone excited last week, because the makers claim it could reach Australia in four hours. Better yet, as it runs on liquid hydrogen, it’s greener than your average plane.
But, can the world actually afford Australia to be that close? I’m exploring the conundrum of the Lapcat A2 over on Celsias.
The Earthbound Report 
does this flight move at the speed of light and the engine capacity is what