An aircraft running on hydrogen that races through the upper atmosphere at speeds exceeding twelve times the speed of sound might seem like a fantasy reserved exclusively for science fiction. That, ...

Hypersonix Launch Systems is an Australian start-up that is turning heads in the hypersonic sector. Its current portfolio includes its unmanned DART, VISR, and Delta Velos demonstrator vehicles, all ...

Liftoff of the "That's Not a Knife" suborbital mission occurred at 7 p.m. ET on Friday (Feb. 27). When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.