Warp drives that let humans zip around other galaxies may no longer belong purely in the realm of science fiction.
Nasa is believed to have been quietly testing a revolutionary new method of space travel that could one day allow humans to travel at speeds faster than light.
Researchers say the new drive could carry passengers and their equipment to the moon in as little as four hours. A trip to Alpha Centauri, which would take tens of thousands of years now, could be reached in just 100 years.
The system is based on electromagnetic drive, or EMDrive, which converts electrical energy into thrust without the need for rocket fuel.
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