In 2013, Poland unveiled a radical new tank—the PL-01, a vehicle designed with stealth capabilities inspired by aircraft like the F-117 Nighthawk. With a futuristic angular design, radar ...

It has an advertised range of 1,640 yards (1,500 m), though I was able to see the heat signature of a cement works across a bay at a distance of about three miles (4.8 km). Using the interface ...

Scientists in China have designed a photovoltaic-thermal integrated air-source heat pump hot water system that uses a phase change tank to lower energy consumption and achieve higher power ...