In this video, you'll see the different types of engines and propulsion systems used for aircraft, my favorite ones: Turbojet, turboprop, turboshaft, and turbofan. You'll also see the Ramjet engine. I ...

For decades, astronomers have been puzzled by strange “zebra stripe” patterns in radio waves from the Crab Pulsar — bright bands separated by complete darkness. Now, new research suggests the answer ...

The Army’s MV-75 tiltrotor aircraft will replace the Black Hawk, offering greater speed, range, and flexibility for modern long-distance combat operations.