China has revealed a new biomimetic underwater drone with a transparent, jellyfish-like body designed for stealth surveillance missions, capable of blending into the deep-sea environment.

Lockheed’s engineers bet on a hydrogen-powered aircraft, the CL-400 Suntan. Stretching nearly 300 feet and fueled by ...

The J58 engine was both miracle and menace, a hybrid that functioned as a turbojet, a ramjet, and a furnace. This episode ...