TechnologyA solar-powered airship is being built to transport cargo more greenly Solar-powered airships could be a greener way to transport cargo. One start-up is building one for delivering freight and says it will fly at half the speed of a jumbo jet News
TechnologyChina may have developed a quantum radar that can spot stealth planes A defence firm has unveiled a prototype quantum radar. If it works, it could use entangled protons to locate stealth aircraft that normally avoid detection News