Ten images of the most important new frontiers mankind faced in 2013, including Voyager 1's journey into deep space and Elon Musk’s Hyperloop concept.
More amazing image galleries of the year:
The year in weather
The year in space
The year in design and architecture
The year in wildife
People of the year
The year in transport
Visions of the future in 2013
2013: Stunning places
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