Spaceships of the future could fly from Earth to Mars in just ten weeks using thrusters that don't need any rocket fuel, according to an ambitious new plan.
A British researcher has been awarded £990,000 ($1.3 million) by the US government to develop a fuel-free rocket engine that converts sunlight into thrust.
The four-year study aims to make the concept – dubbed Em Drive – a reality, with the hope of making space travel far cheaper and safer.
However, not all scientists are convinced, with some dismissing the engine as 'impossible' because to work it would have to violate a fundamental law of physics.
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