A Colorado-based company said it broke the sound barrier three times without generating a sonic boom that reached the ground.

Boom hopes its breakthrough will allow supersonic flights over land, making US coast-to-coast flights 90 minutes faster.

During the second supersonic flight of the XB-1 technology demonstrator today, the jet exceeded Mach 1 three times without a ...

Hot on the heels of its milestone supersonic flight with its demonstrator aircraft, XB-1, Boom Supersonic has another ...

Sonic the Hedgehog has proven that it's a marathon, not a sprint. While many fellow 90s platforming mascots have fallen by t ...