http://vr-zone.com/articles/first-of-it ... 18110.html
A UK company has invented a new jet-like engine that runs like a jet engine through the atmosphere and a rocket engine in space. The company, Reaction Engines Ltd., said that its new ‘Sabre' engine means the end of old fashioned jet travel and rocket delivery.
Seems like a serious step in the right direction for the future of travel, something that has more or less only been avalible in science-fiction before this step.
A motor that can function both in the athmosphere and in space.
This concept engine, which is the first engine of its kind, means that launching materials into space can be done far more efficiently and reaching almost any destinations on earth in 4 hours or less.