Nasa team spends a year 'living on Mars'

A team of Nasa recruits has begun living in a dome near an old volcano in Hawaii to mimic what life would be like on Mars.

The isolation experiment, which will last a year starting on Friday, will be the longest of its type attempted.

The experiment is intended to help Nasa prepare for a possible human mission to the Red Planet.

The six-strong team will live in close quarters under the dome, without fresh air, fresh food or privacy.

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