Since the 1950s rocket engineers have toyed with the idea of a novel engine design that could –- in theory –- revolutionize the way we conceive of space travel. The aerospike might sound like a ...

Rockets have gone mostly unchanged since their introduction in the 20th century. From Apollo 11 in 1969 to the SpaceX Falcon Heavy missions, which began in 2018, both were propelled by rockets with ...