The world's heavy reliance on fossil fuels, especially for transportation, has left a deep mark on both the planet and public health. Burning these fuels releases a flood of greenhouse gases, which ...

Get ready to fly faster than ever before. This jet engine can reach hypersonic speeds right off the runway, which may change the game for civilian flight.

Since the 1960s engineers around the world have been fiddling with a novel type of jet called a rotating detonation engine (RDE), but it has never got beyond the experimental stage. That could be ...