NASA's experimental X-43A didn't have a pilot and couldn't fly independently, but its blisteringly high speeds showed that ...

Breaking Mach 9.6 with an air-breathing engine wasn’t just a speed stunt. It confirmed that scramjets can operate where rockets once had the field to themselves,” said Harry J. Kazianis, citing the ...

Humankind was once determined to break the sound barrier, as it was considered the ultimate achievement in speed. But our technology didn't stop there, as we've built experimental vehicles that can ...