From New York City to London in just 90 minutes? NASA is exploring the potential of a supersonic jet that one day could do just that.

Transatlantic jetliners currently travel at about 600 miles per hour, according to the federal space agency. But NASA's plane could theoretically travel at Mach 4 -- four times faster than the Mach 1, the speed of sound, which is typically 761 miles per hour at sea level.

The plane's unique shape also would theoretically allow supersonic shockwaves to be spread out, preventing the familiar sonic boom from occurring on the ground when the aircraft breaks the sound barrier.

If the project gets off the ground, it would be the first time in more than two decades that there has been a supersonic transatlantic flight since the Concorde, jointly developed by the British and French over 60 years ago, was retired in 2003 due to operating costs.... Read More: WBAL