Airplanes have been able to fly at supersonic speeds since the 1940s, although they are prohibited from conducting commercial flights over land because they produce a sonic boom that disturbs the ...

The United States pursued the X-20 Dyna-Soar as an orbital interceptor and reconnaissance craft in the early 1960s. The Soviet Union’s Spiral program built and flew subscale vehicles and fed lessons ...

Does the moon look brighter and bigger? It's not just you — here's why this month's supermoon is even more super.