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WATCH: Astronaut says psychology of being far from Earth will impact Mars missions

It will be difficult for crews exploring Mars to define their identity "as some of the most distant explorers in human history," says an experienced astronaut.

First Canadian to walk in space Chris Hadfield says the psychological ramifications of being so far from Earth will play a big part in missions to Mars.

Some of Canada's current and former astronauts spoke at an event at the University of Ottawa on Friday.

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