Imagine an aircraft streaking across the sky at over Mach 12, which is twelve times the speed of sound! Moreover, it is powered not by conventional jet fuel but by hydrogen fuel, meaning that it ...

CANBERRA (Reuters) - An experimental jet engine has been successfully tested at speeds of up to 11,000 km (6,835 miles) per hour, or 10 times the speed of sound, during trials in Australia's outback, ...