NASA's simulated Mars mission has come to an end after 4 participants spent a year on an imitation of a Martian habitat.

Scientists will use the study to help with planning to send humans to Mars

ANU Astrophysicist Brad Tucker joins John to talk about what we've learned from the mission, and how soon we'll be sending people to Mars.

Listen to John Stanley live from 8pm-12am Monday to Thursday on 2GB/4BC

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